Jatropha. 97 



* Staminodia filiformia evoluta. 



f Folia ad medium vel minus lobata. 



Q Lobi inciso-dentati 136- -/. angustidens. 



OO Lobi denticulati 137. J. pyrophora. 



ff Folia ultra medium lobata 138. J. aconitifolia- 



** Staminodia nulla 139. /. Kunthiana. 



In hanc affinitatem pertinet 1 40. J. rotundifolia. 



B. Folia penninervia Subsect. b. Phyllacanthae. 



4 44. J. phyllacantha. 



Subsect. a. Urentes Fax. 



132. J. calyculata Pax et K. Hoffm. nov. spec. — Herbaeea, 60 cm alta; caulis 

 dense stimulosus simulque pilosus; pili urentes 8 mm longi, horizontales. Petiolus 

 6 — 13 cm longus, pilosus et dense stimulosus; limbus 10- — -13 cm diametiens, latior quam 

 longus, membranaceus, pilosus simulque stimulosus, circa basin pilorum urentium albo-macu- 

 latus, basi sinu clauso profunde cordatus, ambitu rotundato-reniformis, ad */) fei*e 3-lobus; 

 lobi breves, grosse sinuato-dentati, dentes setaceo-producti ; stipulae late oblique tri- 

 anguläres, 4 mm longae, setaceo-denticulatae. Cymae breviter pedunculatae, congestae, 

 valde stimulosae et pilis vermiculariformibus muniti. Calyces utriusque sexus basi corona 

 pilorum vermiculariformium, inter se ± coalitorum et quasi calyculum formantium 

 muniti. Sepala q 1 (floris juvenilis) extus pilosa et parce stimulosa, ad 2 / 3 in tubum 

 subcylindricum connata, apice obtusa, 5 — 6 mm longa; stamina exteriora libera, 3 in- 

 teriora monadelpha; filamenta glabra; staminodia 2; disci glandulae connatae: sepala Q 

 lanceolata, obtusa, pilosa, parce stimulosa, 7 — 8 mm longa; discus hypogynus urceo- 

 laris, squamis filiformibus brevibus intus auctus; ovarium pilosum et stimulosum; styli 

 basi connati, bis bifldi. 



Tropisches Centralamerika: Mexiko, Michoacan, La Pitirem, 200 m (Lang- 

 lasse n. 244!). 



Einheim. Name: Urtiga. 



Nutzen: Wird gegen syphilitische Krankheiten verwendet. 



Nota. Flores <5 valde juveniles tantum examinare potui. 



133. J. urens L. Spec. pl. ed. 4. (4753) 1007; Müll. Arg. in DC. Prodr. XV. i. 

 (4 866) 4 4 00; in Fl. Brasil. XI. 2. (1874) 500. — Suffrutex ad 4^2 m altus vel 

 herbaeea. Petiolus laminam ± aequans vel superans, stimulosus et pilosus; limbus 

 12 — 13 cm longus et latus, saepius latior quam longus. rarius minor vel major, basi 

 truncatus vel cordatus, ad medium vel ultra medium 3- vel 5-lobus, membranaceus, 

 dr pilosus vel pubescens et stimulosus; lobi ovati vel lanceolati, acuti, anguloso-dentati 

 vel sinuati vel pinnatifidi; stipulae parvae, laciniato-dentatae. Cymae pubescentes, 

 stimulosae, breviter pedunculatae, subpauciflorae, corymbiformes. Calyx q? ad 4 cm 

 longus vel brevior, gracilis, aperiens cylindricus, fauce constrictus, extus tomentellus et 

 stimulosus, usque ad medium lobatus; stamina 8 — 4 0, exteriora fere libera, basi villosa, 

 interiora monadelpha, longiuscule libera; staminodia 2 — 3 vel nulla; ovarium acutum, 

 puberulum, stimulosum, styli graciles, longiuscule connati, 2 — 3-fidi, laciniae integrae vel 

 fissae; Capsula 4 — 4 2 min longa; seinen griseum, 8 mm longum, zt complanatum, 

 caruneulatum. 



a. Folia basi cordata, 5-loba vel 3-loba. 



Var. ct. genuina Müll. Arg. in DC. Prodr. XV. 2. (4 866) 4 4 00; in Fl. Brasil. XL 2. 

 (4 874) 501. — J. urens Jacq. Hort. Vindob. I. (4 770) 8 t. 24. — Folia basi cordata, 

 paulo ultra medium 5-loba, dz 4 2 cm diametientia; lobi ovati, sinuato- vel anguloso- 

 dentati. 



Tropisches Amerika, von den kleinen Antillen und Mexiko bis Brasilien. 



Westindische Provinz: Dominica (Eggers n. 880!); Martinique (Duss 

 n. 2049!, 4060!); St. Vincent (Eggers n. 6846!, Smith n. 164! ; Grenada 



A. Engler, Das Pflanzenreich. IV. (Embryophyta siphonogama) 147. 7 



