290 TWO NEW GENEUA OF COMPOSITE. 



uniserialis, setosus, citissime caducus; setis pluribus, sub^quali- 

 bus, ovario longioribiis, rectis vel sa^pe flexis, albidis, argute setu- 

 losis, setulis erecto- patentibus. 



Herba annua subglabra pumila ; cauliculis abbreviatis ; foliis 

 radicalibus, filiformibus, liuearibus, erectis ; scapis digitalibus, 

 aggregatis, tenuibus ; capitulis croceis. 



P. tenella, sp. unica. Herba fragilis, 3-4-pollicaris ; scapis 

 bracteatis, divisis, glabratis; bracteis lanceolatis, parvulis, sessilibus 

 amplectentibus, interdum teruatis ; capitulis circiter 30-floris, 

 8~i poll- tliam. ; involucri bracteis s?epius 8, lauceolato-oblongis, 

 ^-^ poll, longis, apice acuminatis, parallele pauci-nervosis, glabri- 

 usculis, dorso minute glandulosis ; floribus ^ poll, vel paulum 

 longioribus ; corolla ^^ poll. long£e tubo subtus angustato, super 

 (interdum abrupte) dilatato, lobis lanceolatis oblongisve, apicibus 

 incrassatis exceptis tenuibus ; acb^enio -J^ poll, longo fuscescente, 

 recto vel curvo, apice in annulo tenui subangulato cartilagineo 

 termiuante ; receptaculo fructifero J^ poll. diam. 



Habitat in distr. Huilla, ad Humpata in pascuis ; cum fl. et fr., 

 Aprili 1860; legit Fr. Welwitsch, Coll. Carp. 690. 



This belongs to the tribe Asteroidem, subtribe HomocJiromecB. 

 There are two kinds of flower, slightly differing, one with a less 

 deeply divided corolla than in the other, and with the longer kind 

 of androecium accompanied by the shorter kind of style. The 

 generic name is derived from ^i^voq, rubbed of, and 6pi|, Tpi%o$, 

 hair, with reference to the very early shedding of the pappus. 



Adenogonum Welw. MS. in herb., gen.nov. 



Capitula heterogama longe radiata homochroma multiflora ; 

 floribus ligulatis exterioribus uniserialibus fcemineis fertilibus, 

 ligulis conspicuis apice tridentatis ; floribus tubulosis interioribus 

 pluriserialibus hermaphroditis fertilibus pentameris. Involucrum 

 subhemisphaericum ; bracteis pluriserialibus, imbricatis, in^equalibus, 

 demum patentibus vel reflexis, interioribus sublinearibus, acutis, 

 siccis, rigidis, margine scariosis, quam exteriores gradatim angusti- 

 ores minus rigidaB longioribus. Eeceptaculum nudum demum 

 planiusculo-convexum. Auther£e incluScTB, apice in appendicibus 

 lanceolatis productse, basi obtuse ecaudatse ; filamentis prope 

 apicem glandula ceracea aurantiaca auctis. Styli exserti rami 

 elongati, anguste subclavato-incrassati, dense puberuli, arcuato- 

 incurvi, apice obtusi minute apiculati ; styli basi (nectario) bulbosa. 

 Ach^enium obovoideum, compressiusculum, pilosum, secus margines 

 mediamque faciem vel medias facies longitudinaliter costatum ; 

 costis glandorum majusculorum oleosorum serie utrinsecus intra 

 margines et secus medium tuberculatis. Pappus pauciserialis, 

 setosus, persistens ; setis rectis, rigidulis, interioribus subrobustis 

 scabridis ina^quilongis pallide stramineis, exterioribus brevibus 

 srepe parum evolutis pallidioribus planioribus tenuioribus margine 

 subciliatis. 



Herba rigida ; foHis oppositis vel rarius superioribus alternis, 

 ovatis, dentatis ; capitulis terminalibus subterminalibusque, pedun- 

 culatis, mediocribus ; floribus IsBtissime flavis. 



