240 



Observation. — Très voisin du V. Quartiniana A. Rich. dont il se 

 différencie par ses feuilles à dents aiguës. 



Vernonia Hockii De WUdeman et Muschler spec. 

 nov. 



Radix sine dubio perennis, palaris, crassa vel lignosa, 

 fibrillis tenuibus nonnullis horizontalibus aucto. Gaules 

 perbreves, crassi, nigro-purpurascentes, teretiusculi, 

 glaberrimi vel in parte superiore pilis satis longis sericeis 

 albidis simplicibus unicellularibus dense vel densissime 

 obtecti, 3-3 1/2 cm. longi. Folia alterna (internodiis in 

 speciminibus vix 1/4-1/2 cm. longis), sessilia vel rarius 

 breviter petiolata (petiolis 2-2,5 mm. longis, circa 

 1 1/2-2 mm. latis, supra leviter canaliculatis, superne 

 utrinque sulcatis, pilis eis partis caulis superioris 

 similibus plus minusve dense obtectis vel interdum 

 subglabratis), lineari-lanceolata vel linearin,basin versus 

 sensim angustata, apicem versus subacuminata, margine 

 repando-dentata (dentibus 1 1/2-2 mm.altis, 3-4 1/2 mm. 

 inter se distantibus), obscure penninervia (nervis 

 lateralibus in utroque dimidia facie 6-8, utrinque 

 subconspicuis), membranacea, utrinque glaberrima, 

 obscure viridia vel in sicco viridi-brunnea. Scapi 

 10-15 cm. longi, glaberrimi, teretes, viridi-ochracei. 

 Capitula pro génère permagna, pluriflora, solitaria ; 

 involucri late campanulati squamae 5-6 seriatae; 

 exteriores parvae, filiformes, fuscescentes, interiores bis 

 longiores, usque ad 1 1/2-2 cm. longae, virides, lineari, 

 oblongae, apice acutae interdum mucronulatae, exterio- 

 res interioribus paulo longiores anguste lanceolatae 

 vel lineari-lanceolatae pallidae, apice subrubrae, 

 acutissimae. Flores hermaphroditi. Gorollae tubulosae 

 cetus interdum mimute puberulae, intus glaberrimae, 



