Croton subsect. Medea (Klotzsch, 1841) Pax, 1890

Medeiros, Débora, Valle, Luci De Senna, Esser, Hans-Joachim & Alves, Ruy José Válka, 2016, Floristic and taxonomic treatment of Croton subsect. Medea (Euphorbiaceae) from Brazilian campos rupestres, Phytotaxa 263 (3), pp. 167-201 : 170-171

publication ID

https://doi.org/ 10.11646/phytotaxa.263.3.1

persistent identifier

https://treatment.plazi.org/id/6E7E87A1-FFAD-3840-A8AB-FA57FA6BFF30

treatment provided by

Felipe

scientific name

Croton subsect. Medea
status

 

Key to species of Croton subsect. Medea from Brazilian campos rupestres

1. Leaves glabrous ......................................................................................................................................................... Croton arlineae View in CoL

- Leaves with indumentum..................................................................................................................................................................2

2. Leaves petiolate, petiole longer than 4 mm .......................................................................................................................................3

- Leaves subsessile, petiole 1−2 mm long...........................................................................................................................................4

3. Leaf blade lanceolate to narrowly lanceolate, base symmetric, margin irregularly serrate along the whole length; margin of the sepals of the pistillate flower with entire, sessile glands; petals absent in the pistillate flowers .......................... C. cerino-dentatus View in CoL

- Leaf blade ovate-lanceolate, base asymmetric, margin irregularly serrate except for the base; margin of the sepals of the pistillate flower stipitate-glandulose; petals glanduliform in the pistillate flowers ................................................................. C. siderophyllus View in CoL

4. Inflorescences without a naked sterile zone between the basal pistillate flowers and the apical staminate ones.............................5

- Inflorescences with a naked sterile zone between the basal pistillate flowers and the apical staminate ones..................................7

5. Sepals of the staminate flower with stipitate-glandulose margin .................................................................................. C. staechadis

- Sepals of the staminate flower with entire margin............................................................................................................................6

6. Leaf blade not punctuated, leaf margin entire ........................................................................................................... C. timandroides View in CoL

- Leaf blade punctuated, leaf margin serrate ....................................................................................................................... C. serratus View in CoL

7. Sepals of the pistillate flower with entire margin..............................................................................................................................8

- Sepals of the pistillate flower with stipitate-glandulose margin......................................................................................................10

8. Sepals of the pistillate flowers with margin eglandulose ............................................................................................... C. pradensis View in CoL

- Sepals of the pistillate flowers with margin entire with sessile glands.............................................................................................9

9. Stipules triangular; petals of the pistillate flower absent ............................................................................................. C. lenheirensis View in CoL

- Stipules lanceolate, laciniate-glandulose; petals of the pistillate flowers subflabelliform ............................................ C. gnidiaceus View in CoL

10. Leaf blade with margin entire, stipules 2−3 mm long; petals of the staminate flower glabrous on both surfaces, filaments and anthers pilose ................................................................................................................................................................. C. Josephinus

- Leaf blade with margin laciniate-glandulose, stipules 4−7 mm long; petals of the staminate flower pilose on the adaxial surface and glabrous on the abaxial one, filaments villous at the base and anthers glabrous .............................................................. C. vestituss

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