Eryngium. 



109 



ff Gaulis ib elatus, usque inelralis (tanturn 

 in E. carlinae saepe subnullus), plurifiircalus, 

 raniis repelife cymoso ramulosis; raro bre- 

 vissimus sed simplex ei monoccphaliis aul 

 dr elongaliis et inferne subbis trifun-aliis. 

 (3 Folia subilo petiolata, basi cordata vol 



raro ovata Secl. XXII. Petiolata Wolff. 



OO Folia sensim in petiolum longuni vcl 

 brevem anguslata. 



/\ Folia imprimis subliis subunicostala. 

 Bracteae involucrales virides, vix 



rigidnlae. angustae Sect. XXIll. Serrata WolfT. 



/\,,^ Folia in parte media angusla Jongi- 

 tudinali cum petiolo ± manifeste 

 fistulosa ibique anguste parallclinervia. 

 Caulis perbrevis et monocephalus .vel 

 zt elongatus et inferne semel (ra- 

 rissime bis) Irifurcatus, ramis zh elon- 

 gatis. Species alpinae andinae et 



mexicanae Sect. XXIV. Stellata WolfT. 



A/\ A Folia nervis paucis vel subnumerosis 

 in aream angustam vel latiusculam 

 dispositis percursa. Inflorescentia 

 repetite cjmosa. 



D Bracleae involucrales rigidae, in- 

 ciso-serratae (raro integrae),supra 

 nitenti-albidae. Capitula nigri- 

 canti-violacea, semper receptaculo 

 ultra capitula elongato comata; 

 in una specie {E. comosum) folia 



basalia saepe pinnatifida Sect. XXV. Carlin iformia Wolff. 

 □ G Bracteae involucrales angustae, 

 virides, saepe brevissimae; florales 

 flores superantes vel eis breviores. 

 Capitula coma vera non instrucla. 



Sect. XXVI. Poetida WolfT. 



ß. Gaules saepissime plures tenuissimi vel tenues pro- 



slrati, primo semel vel bis dichasialiter divisi, dein 



in monochasia saepe elongata producti. Capitula 



cylindrica; bracteae involucrales parvae; fructus quoad 



squamas ad »Isophljclidia« pertinentes .... Sect. XX. Flaccida Wolff. 

 b. Folia usque ad laminain elongalam anguslam vel latam 

 et vaginam saepissime eximie evolutam reducla. Nervi 

 pai'slleli vel in foliis dr lanciformibus leviter divergentes, 

 aut in aream mcdianam anguslam vel latam dispositi. 

 Species eximie »monocotjloideae«, pleraeque austro- 

 americanae. 



a. Folia obovato-rotundata usque oblongo-linearia; nervi 

 in aream latam dispositi vel leviter divergentes. In- 

 florescentia depauperata. Capitula colorala, globosa 

 usque ovoidea; fructus quoad squamas ad »Helcro- 



phljctidia« pertinentes Sect. XXVII. Sanguisorbiformla Wolff. 



ß. Folia dr elongata ; nervi subparalleli vel leviter diver- 

 gentes vel ex area parallelinervi parum evoluta leviter 



