Oxalis (sect. Polymorphae) Lourteig
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2025
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| _version_ | 1866902012126298112 |
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| author | Fiaschi, Pedro Cabral, Fernando Santos Caballero, Leonardo Ronald Gaspar Lima, Duane Fernandes |
| author_facet | Fiaschi, Pedro Cabral, Fernando Santos Caballero, Leonardo Ronald Gaspar Lima, Duane Fernandes |
| contents | <p><i>Identification key to species of Oxalis sect. Polymorphae</i></p><p>(species with * are here segregated from <i>O. polymopha</i> s. lat. but should be excluded from the section)</p><p>1. Leaves arranged along the stem (Fig. 7A), sometimes more densely so at stem apex, but not forming a single terminal pseudo-whorl ......................................................................................................... 2</p><p>– Leaves densely grouped at stem apex, forming a single terminal pseudo-whorl (Fig. 14S, Y) or multiple pseudo-whorls .................................................................................................................. 10</p><p>2. Pedicel and sepals with glandular hairs (Fig. 7H); sometimes rare and diminute ............................ 3</p><p>– Pedicel and sepals without glandular hairs ....................................................................................... 5</p><p>3. Leaflet blades with obtuse, rounded or slightly retuse apex ................................ <i>O. alstonii</i> Lourteig</p><p>– Leaflet blades with acute, acuminate or caudate apex ...................................................................... 4</p><p>4. Inflorescences longer than the petiole of adjacent leaves, dichasial branches> 5 mm long, with flowers arranged distally to a long sterile portion; leaflet blades glabrous, with occasional marginal hairs .. .................................................................................... <i>O. pardoensis</i> (Lourteig) T.S.Costa & Fiaschi</p><p>– Inflorescences shorter than the petiole of adjacent leaves, dichasial branches 1.5–4 mm long, with flowers densely grouped along the entire length; leaflet blades glabrescent adaxially, with moderate, patent to appressed hairs abaxially ..................................................... <i>O. animarum</i> Fiaschi sp. nov.</p><p>5. Inflorescences mostly cauliflorous (Fig. 10F), not observable in young plants with poorly developed stem ................................................................................................................................................... 6</p><p>– Inflorescences mostly axillary (Fig. 6A), but sometimes with a few cauliflorous ones ................... 7</p><p>6. Fruits with carpels distally prolonged ca 2 mm long, slightly longer than the sepals (Fig. 8L); leaf blades pubescent; flowers with yellow petals (Fig. 8K); inflorescences usually with bifid dichasial branches (Fig. 8I) ................................................................................................. <i>O. decipiens</i> Progel</p><p>– Fruits with carpels not prolonged (Fig. 10K–L) or distally prolonged up to ca 0.5 mm of their length, shorter than the sepals; leaf blades glabrous; flowers with white petals (Fig. 10J); inflorescences with entire dichasial branches (Fig. 10H) .......................................................... <i>O. idimae</i> Fiaschi sp. nov.</p><p>7. Leaflet blades with obtuse, rounded or slightly retuse apex ................................ <i>O. alstonii</i> Lourteig</p><p>– Leaflet blades with acute, acuminate or caudate apex ...................................................................... 8</p><p>8. Flowers with white to pinkish corolla lobes ...................................... <i>O. polymorpha</i> Mart. ex Zucc.</p><p>– Flowers with yellow corolla lobes .................................................................................................... 9</p><p>9. Trinerved leaflets (Fig. 6E); leaflet blades abaxially with abundant, appressed hairs; inflorescence dichasial branches with flowers congested from the base (Fig. 6K) ..... <i>O. amorimii</i> Fiaschi sp. nov.</p><p>– Pinnately-nerved leaflets (Fig. 1C); leaflet blades abaxially glabrous, with occasional hairs along the margin; inflorescence dichasial branches with flowers not congested or, if congested, after a sterile portion (Fig. 1A) ........................................................ <i>O. pardoensis</i> (Lourteig) T.S.Costa & Fiaschi</p><p>10. Flower and fruit pedicel glabrous, sometimes with sparse, appressed hairs in bud ........................11</p><p>– Flower and fruit pedicel with sparse to very abundant, appressed, curved or patent hairs ............ 14</p><p>11. Petioles with intermixed unicelular and pluricelular hairs; mature inflorescences with short dichasial branches (0.5–3 mm long) and flowers (or persistent floral bracts) distributed along the entire length ........................................................................... <i>O. cipoensis</i> T.S.Costa, Sakuragui & Fiaschi</p><p>– Petioles glabrous or only with unicelular hairs; mature inflorescences usually with elongated dichasial branches (3.5–17 mm long) and flowers (or persistent floral bracts) distally congested ............... 12</p><p>12. Terminal leaflet blade 8–10.5 × ca 2 mm, narrowly elliptic to narrowly oblong or slightly oblanceolate; young stem glabrous; floral bracts glabrous; flowers with yellow corolla lobes ................................ ......................................................................................................................... <i>O. artemioides</i> Fiaschi</p><p>– Terminal leaflet blade 10–66 × 5–38 mm, ovate to lanceolate or elliptic to narrowly elliptic; young stem with moderate to very abundant, appressed or curved hairs; floral bracts with sparse, appressed hairs; flowers with white corolla lobes ........................................................................................... 13</p><p>13. Leaves grouped in a single, terminal pseudo-whorl; habit unbranched, 10–40 cm tall; terminal leaflet blade 20–66 × 17–38 mm, the base obtuse to rounded or slightly cordate ... <i>O. colatinensis</i> Fiaschi</p><p>– Leaves grouped in multiple pseudo-whorls; habit branched, (20–) 50–200 cm tall; terminal leaflet blade 10–20(–30) × 5–13 mm, the base cuneate to obtuse ................................... <i>O. blackii</i> Lourteig</p><p>14. Young stem with abundant to very abundant, appressed-retrorse hairs ..... <i>O. umbraticola</i> A.St.-Hil.</p><p>– Young stem with sparse to very abundant, appressed, curved or patent hairs, sometimes intermixed with glandular, pluricellular hairs, or glabrescent .......................................................................... 15</p><p>15. Peduncle and/or pedicels with intermixed unicelular and glandular-pluricelular hairs, or only with glandular hairs ................................................................................................................................ 16</p><p>– Peduncle and pedicels usually only with unicelular hairs, sometimes with few intermixed glandular hairs ................................................................................................................................................. 17</p><p>16. Lateral leaflets with symmetric to slightly asymmetric blades, similar to the terminal leaflet blade; petiole longer than the terminal leaflet blade ................................................... <i>O. kollmannii</i> Fiaschi</p><p>– Lateral leaflets with strongly asymmetric blades, diferente from the terminal leaflet blade; petiole usually shorter than the terminal leaflet blade ...................................................... <i>O. neuwiedii</i> Zucc.</p><p>17. Leaflet blades glabrous or glabrescent on both surfaces ................................................................ 18</p><p>– Leaflet blades with sparse to abundant hairs abaxially, glabrescent or with sparse hairs adaxially ... ......................................................................................................................................................... 20</p><p>18. Petioles as long as or longer than terminal leaflet blade; leaflet blades with obtuse, rounded or slightly retuse apex; corolla ≤ 10 mm wide ...................................................................... <i>O. alstonii</i> Lourteig</p><p>– Petioles usually shorter than terminal leaflet blade; leaflet blades with acute to acuminate apex; corolla ≥ 15 mm wide .................................................................................................................................. 19</p><p>19. Terminal leaflet blade ≥2 × longer than the lateral blades (Fig. 11B), with 5 –7 pairs of secondary veins; blade margins plane, ciliate. Pedicels with abundant, short, retrorse hairs; peduncles 9–50 mm long ..................................................................................................... <i>O. itatingae</i> Fiaschi sp. nov. *</p><p>– Terminal leaflet blade up to ca 1.5 × longer than the lateral blades (Fig. 13C, D), with 9–12 pairs of secondary veins; blade margin plane to revolute, with the occasional hairs usually hiding under the margin. Pedicels with sparse to moderate, curved to appressed, antrorse hairs; peduncles 82–110 mm long .................................................................... <i>O. tijucana</i> (Lourteig) Fiaschi comb. et stat. nov. *</p><p>20. Terminal leaflet apex acute or acuminate; lateral leaflets strongly asymmetric ............................. 21</p><p>– Terminal leaflet apex obtuse or rounded, sometimes acute; lateral leaflets symmetric or slightly asymmetric ....................................................................................................................... <i>O. puberula</i></p><p>21. Flowers with white to pinkish corolla lobes; leaflet blades adaxial surface usually glabrescent ....... ............................................................................................................ <i>O. polymorpha</i> Mart. ex Zucc.</p><p>– Flowers with yellow corolla lobes; leaflet blades adaxial surface with moderate, appressed hairs ... ........................................................................................................................... <i>O. roselata</i> A.St.-Hil.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15521722 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Oxalis (sect. Polymorphae) Lourteig Fiaschi, Pedro Cabral, Fernando Santos Caballero, Leonardo Ronald Gaspar Lima, Duane Fernandes Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Oxalidales Oxalidaceae Oxalis <p><i>Identification key to species of Oxalis sect. Polymorphae</i></p><p>(species with * are here segregated from <i>O. polymopha</i> s. lat. but should be excluded from the section)</p><p>1. Leaves arranged along the stem (Fig. 7A), sometimes more densely so at stem apex, but not forming a single terminal pseudo-whorl ......................................................................................................... 2</p><p>– Leaves densely grouped at stem apex, forming a single terminal pseudo-whorl (Fig. 14S, Y) or multiple pseudo-whorls .................................................................................................................. 10</p><p>2. Pedicel and sepals with glandular hairs (Fig. 7H); sometimes rare and diminute ............................ 3</p><p>– Pedicel and sepals without glandular hairs ....................................................................................... 5</p><p>3. Leaflet blades with obtuse, rounded or slightly retuse apex ................................ <i>O. alstonii</i> Lourteig</p><p>– Leaflet blades with acute, acuminate or caudate apex ...................................................................... 4</p><p>4. Inflorescences longer than the petiole of adjacent leaves, dichasial branches> 5 mm long, with flowers arranged distally to a long sterile portion; leaflet blades glabrous, with occasional marginal hairs .. .................................................................................... <i>O. pardoensis</i> (Lourteig) T.S.Costa & Fiaschi</p><p>– Inflorescences shorter than the petiole of adjacent leaves, dichasial branches 1.5–4 mm long, with flowers densely grouped along the entire length; leaflet blades glabrescent adaxially, with moderate, patent to appressed hairs abaxially ..................................................... <i>O. animarum</i> Fiaschi sp. nov.</p><p>5. Inflorescences mostly cauliflorous (Fig. 10F), not observable in young plants with poorly developed stem ................................................................................................................................................... 6</p><p>– Inflorescences mostly axillary (Fig. 6A), but sometimes with a few cauliflorous ones ................... 7</p><p>6. Fruits with carpels distally prolonged ca 2 mm long, slightly longer than the sepals (Fig. 8L); leaf blades pubescent; flowers with yellow petals (Fig. 8K); inflorescences usually with bifid dichasial branches (Fig. 8I) ................................................................................................. <i>O. decipiens</i> Progel</p><p>– Fruits with carpels not prolonged (Fig. 10K–L) or distally prolonged up to ca 0.5 mm of their length, shorter than the sepals; leaf blades glabrous; flowers with white petals (Fig. 10J); inflorescences with entire dichasial branches (Fig. 10H) .......................................................... <i>O. idimae</i> Fiaschi sp. nov.</p><p>7. Leaflet blades with obtuse, rounded or slightly retuse apex ................................ <i>O. alstonii</i> Lourteig</p><p>– Leaflet blades with acute, acuminate or caudate apex ...................................................................... 8</p><p>8. Flowers with white to pinkish corolla lobes ...................................... <i>O. polymorpha</i> Mart. ex Zucc.</p><p>– Flowers with yellow corolla lobes .................................................................................................... 9</p><p>9. Trinerved leaflets (Fig. 6E); leaflet blades abaxially with abundant, appressed hairs; inflorescence dichasial branches with flowers congested from the base (Fig. 6K) ..... <i>O. amorimii</i> Fiaschi sp. nov.</p><p>– Pinnately-nerved leaflets (Fig. 1C); leaflet blades abaxially glabrous, with occasional hairs along the margin; inflorescence dichasial branches with flowers not congested or, if congested, after a sterile portion (Fig. 1A) ........................................................ <i>O. pardoensis</i> (Lourteig) T.S.Costa & Fiaschi</p><p>10. Flower and fruit pedicel glabrous, sometimes with sparse, appressed hairs in bud ........................11</p><p>– Flower and fruit pedicel with sparse to very abundant, appressed, curved or patent hairs ............ 14</p><p>11. Petioles with intermixed unicelular and pluricelular hairs; mature inflorescences with short dichasial branches (0.5–3 mm long) and flowers (or persistent floral bracts) distributed along the entire length ........................................................................... <i>O. cipoensis</i> T.S.Costa, Sakuragui & Fiaschi</p><p>– Petioles glabrous or only with unicelular hairs; mature inflorescences usually with elongated dichasial branches (3.5–17 mm long) and flowers (or persistent floral bracts) distally congested ............... 12</p><p>12. Terminal leaflet blade 8–10.5 × ca 2 mm, narrowly elliptic to narrowly oblong or slightly oblanceolate; young stem glabrous; floral bracts glabrous; flowers with yellow corolla lobes ................................ ......................................................................................................................... <i>O. artemioides</i> Fiaschi</p><p>– Terminal leaflet blade 10–66 × 5–38 mm, ovate to lanceolate or elliptic to narrowly elliptic; young stem with moderate to very abundant, appressed or curved hairs; floral bracts with sparse, appressed hairs; flowers with white corolla lobes ........................................................................................... 13</p><p>13. Leaves grouped in a single, terminal pseudo-whorl; habit unbranched, 10–40 cm tall; terminal leaflet blade 20–66 × 17–38 mm, the base obtuse to rounded or slightly cordate ... <i>O. colatinensis</i> Fiaschi</p><p>– Leaves grouped in multiple pseudo-whorls; habit branched, (20–) 50–200 cm tall; terminal leaflet blade 10–20(–30) × 5–13 mm, the base cuneate to obtuse ................................... <i>O. blackii</i> Lourteig</p><p>14. Young stem with abundant to very abundant, appressed-retrorse hairs ..... <i>O. umbraticola</i> A.St.-Hil.</p><p>– Young stem with sparse to very abundant, appressed, curved or patent hairs, sometimes intermixed with glandular, pluricellular hairs, or glabrescent .......................................................................... 15</p><p>15. Peduncle and/or pedicels with intermixed unicelular and glandular-pluricelular hairs, or only with glandular hairs ................................................................................................................................ 16</p><p>– Peduncle and pedicels usually only with unicelular hairs, sometimes with few intermixed glandular hairs ................................................................................................................................................. 17</p><p>16. Lateral leaflets with symmetric to slightly asymmetric blades, similar to the terminal leaflet blade; petiole longer than the terminal leaflet blade ................................................... <i>O. kollmannii</i> Fiaschi</p><p>– Lateral leaflets with strongly asymmetric blades, diferente from the terminal leaflet blade; petiole usually shorter than the terminal leaflet blade ...................................................... <i>O. neuwiedii</i> Zucc.</p><p>17. Leaflet blades glabrous or glabrescent on both surfaces ................................................................ 18</p><p>– Leaflet blades with sparse to abundant hairs abaxially, glabrescent or with sparse hairs adaxially ... ......................................................................................................................................................... 20</p><p>18. Petioles as long as or longer than terminal leaflet blade; leaflet blades with obtuse, rounded or slightly retuse apex; corolla ≤ 10 mm wide ...................................................................... <i>O. alstonii</i> Lourteig</p><p>– Petioles usually shorter than terminal leaflet blade; leaflet blades with acute to acuminate apex; corolla ≥ 15 mm wide .................................................................................................................................. 19</p><p>19. Terminal leaflet blade ≥2 × longer than the lateral blades (Fig. 11B), with 5 –7 pairs of secondary veins; blade margins plane, ciliate. Pedicels with abundant, short, retrorse hairs; peduncles 9–50 mm long ..................................................................................................... <i>O. itatingae</i> Fiaschi sp. nov. *</p><p>– Terminal leaflet blade up to ca 1.5 × longer than the lateral blades (Fig. 13C, D), with 9–12 pairs of secondary veins; blade margin plane to revolute, with the occasional hairs usually hiding under the margin. Pedicels with sparse to moderate, curved to appressed, antrorse hairs; peduncles 82–110 mm long .................................................................... <i>O. tijucana</i> (Lourteig) Fiaschi comb. et stat. nov. *</p><p>20. Terminal leaflet apex acute or acuminate; lateral leaflets strongly asymmetric ............................. 21</p><p>– Terminal leaflet apex obtuse or rounded, sometimes acute; lateral leaflets symmetric or slightly asymmetric ....................................................................................................................... <i>O. puberula</i></p><p>21. Flowers with white to pinkish corolla lobes; leaflet blades adaxial surface usually glabrescent ....... ............................................................................................................ <i>O. polymorpha</i> Mart. ex Zucc.</p><p>– Flowers with yellow corolla lobes; leaflet blades adaxial surface with moderate, appressed hairs ... ........................................................................................................................... <i>O. roselata</i> A.St.-Hil.</p> |
| title | Oxalis (sect. Polymorphae) Lourteig |
| topic | Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Oxalidales Oxalidaceae Oxalis |
| url | https://doi.org/10.5281/zenodo.15521722 |