48 



F. Pax. — Euphorbiaccac-Acalypheae-Plukenetünae. 



ex Presl, Bot. Bemerk, (i 844) 109. — Croton palustre Sieber in ScLed. — Volubilis ; caules 

 elongati, tenues, juveniles fulvo-hirsuto-pubescentes, deinum rh glabrati, rarius breviter 

 pubescentes, Petiolus i — 5 cm longus; limbus 3 — <5 cm longus, 7 mm — 7 cm latus, 

 ambitu satis variabilis, triangulär!- vei lanceolato-ovatus vel lineari-lanceolatus, acumi- 

 natus, basi truncato-obtusus vel ± aperte cordatus vel rarius cunealo-acutatus, ± ser- 

 rato-dentatus vel dentatus vel subinteger, juvenilis hirsuto-pubescens, demum nervis ex- 

 ccptis glabrescens et ± stimulosus vel estimulosus, rarius molliter et breviter pubes- 

 cens, palmatinervius, slipulae ovato-lanceolatae , ± 3 mm longae. Inflorescentiae basi 

 florem Q longe pedicellatum gereutes, deinde (j^, pluriflorae, 2 — 6 cm longae, laterales, 

 interdum subfasciculalae, pubescentes; rhachis tenella; bracteae (3^ < — 2 mm longae, 

 lanceolato-ovatae, acuminatae, 1-florae; pedicellus (J' 2 — 3 mm longus, supra medium 

 arliculatus; pars persistens bracteis *brevior vel longior; pedicellus Q 4 — 5 mm, sub 

 fructu ad 5 cm longus, tenellus. Calyx q' 2 mm latus, subglaber; sepala 3, elliptica, 

 acuta; stamina I — 3; filamenta brevia, crassa; antherae extrorsae; ovarii rudimentum 

 nanum vel nuUum. Sepala Q 6, lineari- vel ovato-lanceolata, persistentia, 2 mm 

 ionga; ovarium hispidum, verrucosum vel gibbosum; styli dz connati, partes liberae 

 revolutae. Capsula 6 — 7 mm diametiens, gibbosa, saepe stimulosa. Semina globosa, 

 badia, 2 mm diametientia. In iisdem speciminibus capsulae normales evolutae sunt et 

 pro pai'te minore carpidiis i — 2 abortivis fructus unilocularis et longius breviusve 2 — 3- 

 cornutus, uionospermus, — Fig. t 4. 



Im tropischen Amerika von Mexiko und Westindien bis Uruguay und 

 Argentinien südwärts weit verbreitete Gebüschpflanze, ostwärts bis ins 

 andine Gebiet; ferner im tropischen Westafrika von Sierra Leone bis 

 Angola. Prain vermutet eine Einschleppung der Art nach Afrika, was nicht unwahr- 

 scheinlich ist. 



Species quoad indumentum et ambitum foliorum valde variabilis, sed varietates 

 acceptae vix certis characteribus distinguendae sunt et inter se formis intermediis con- 

 junguntur, etsi habitu saepe valde inter se distant. 



Clavis varietatum. 



A. Folia niajuscula, 7 — 45 cm longa, 

 3 — 7 cm lata. 



a. Folia basi iate rotundata vel 

 truncata, antice dentata, basin 

 versus integra var 



b. Folia basi cordata, subintegra 

 vel aequaliter dentata .... var 



B. Folia minora, 3 — 9, rarius ad 

 4 cm longa, 7 — 40 mm lata, 

 a. Indumentum hirsuto-pubescens, 



saepissime non moUe ; pars pe- 

 dicelii of persistens bracteam 

 saepissime non superans. 

 u. Folia basi cordata vel trun- 

 cata. 



I. Folia ambitu triangulari- 

 ovata, rb serrata. 

 ^. Pedicellus ^ semper 

 elongatus. 



* Folia grosse serrata var 

 ** Folia dentata vel 



serrata var. Ö. genuina Müll. Arg 



8. Pedicellus Q parlem 

 (^ inflorescentiae vix 



a. grandifolia Müll. Arg. 



(i. longifolia Pax et K. Hoffm. 



serra (Poepp. et Endl.) Müll. Arg. 



