l^ 



298 BULLETIN DE l'herbier BOISSIER (2"^« SÉR.). (A38) 



Var. foliosa phyllis involucris exterioribus spathulatis sat magnis. 



SufFrutex 0,2-0,4, petala violacea, in arenosis p, Vaquerios (]apibuy, Aug., 

 4378. 



Vernonia h'ngua nov. spec. 



Caulis erectus robustus basi ad 5 mm. crassus, supra 3 mm., profunde 10-sul- 

 catus subscaber, pauciramosus, ramis erectis, glaber, oculo armato verrucis 

 acutis erectis brevissimis scabriusculus, ad 1 m. altus vel altior ; folia oblonga 

 subcoriacea, superiora oblongo-linearia vel linearia, marginibus auguste revo- 

 lutis, in inferioribus patentibus et minute remoteque denticulatis, subtus incons- 

 picue glandulosa 200/38, 180/24, 200/17, 250/19, 200/5 mm. ultima minora, basi 

 iate adnata et decurrentia glaberrima, nervo medio robusto solum conspicuo ; 

 inflorescentia paniculate subscorpioidea haud ampla, capitulis fero omnibus 

 sessilibus, ramis dorsiveiitralibus capitula 3-iO approximata ferentibus ; invo- 

 lucrum latum phyllis junioribus tenuibus ce. 18, rubescentibus, ce. 3 seriatis, 

 oblongis, obtusiusculis vel interioribus interdum apiculatis, margine et apice 

 pallidioribus, dorso maculis irregularibus nigris tenuibus et glandulis sessilibus 

 nitentibus conspersis ; capitula paulo latiora quam longa (11/10 mm.), ce. 20- 

 25 flora; achaenia leviter costata in costis pilis brevibus erectis pilosa, in valle- 

 culis glandulis numerosis nitentibus conspersa. 



Fleurs roses, dans les campos un peu humides. Avril, 786, Balansa. HB. DC. 



Vernonia hexantha. 



Var. Balansœ noh., panicula amplissima, corymbosa, subsordida, foliis longis 

 lanceolatis vel oblougo-lanceolatis sensim apieem versus attenuatis marginibus 

 ut videtur plicato-subserratis. 



Fleurs d'un blanc rosé, Caaguazu, dans les campos, 13 Nov. 1874, 921. 



Haec species saepe est confusa cum V. megapotamica Spr. a qua involucro haud 

 squarroso sed phyllis adpressis sat ditfert. 



Hue pertinet verisimiliter V. megapotamica var. eriocephala Malme, Die 

 Gomposit. der 1. Regnell'schen Exped. in k. Svensk. Vetensk-Akad. Handl., 23, 

 tab. I, 1, cujus involucra haud squarrosa simillima sunt V. hexanthœ S. Bip. 



Vernonia hexantha Schultz. Bip. 



Mss. ; Baker 1. c, VI, ii, 27. 



Var. paraguariensis nob., foliis latioribus ellipticis^ panicula minus ampla. 



SufFrutex 0,5-0,8, corolla violacea, in campo p. Igatimi, Nov., 5443. 



Var. eleagnoides nob., foliis oblongis haud acuminatis, angustis, paniculae 

 ramis divaricatis, inflorescentia foliosa, 



Suffrutex 0,5-1 m., eorolla violacea, in dumeto p. f. .Jejui-guazu, Dec, 5729. 



Vernonia Hystrix nov. spee. 



Suffrutex O.o-l m. eaulibus simplieibus(?), striatis 3 mm. erassis, glabres- 

 centibus ; folia numerosa linearia sessilia acuta basi rotundata haud angustata, 

 supra nitida, tenuissime et crebre sub lente albo-argenteo punctulata marginibus 

 valde revoiutis, subtus pilis longis tenuiter niveo lanata, nervo medio supra 

 impresso subtus exseulpto glabro saepe solum visibile, 80/3, 60/2,6, 70/2,5, 

 40/2,2 mm. ; inflorescentia spiciformis densa 15/2 cm., 5/2 cm. ; glomeruli 

 capitulorum vel capitula singula axillaria sessilia, inferiora interdum subver- 

 licillata vel alterna bracteis foliaceis linearibus duplo vel triplo superata, bracteis 

 patentibus versus apieem sensim decreseentibus; capitula ovata vel oblonga ad 

 10-12 mm. longa, involucro ad 4 mm. lato, phyllis 4-5 seriatis, imbricatis ovatis 

 subscariosis vel ex viridi purpurascentibus in acumen spinosum ce. 2 mm. 

 longum prolongatis squarroso ; flores 6-7 violacei, ovario piloso, pappo apice 

 sordide albido. 



