1110 K. H. Zahn. — Hieracium. 



pilosum, margine densiuscule breviterque ciliatum et ininute subglandulosum; caulioa 

 5 — 20 sensim decrescentia, ima oblonga obtusa vel saepe valde elongata submagna 

 (ad 18 :1,5 cm) lanceolata acuta in petiolum latissime alatum basi subvaginantem 

 attenuata, margine sparsim vel modice ciliata (2 — 4 mm), ceterum glabra, saepe zb 

 purpurascentia, reliqua valde sensim angustiora et breviora glaberrima basi vix attenuata 

 sessilia, summa in bracteas lineari-lanceolatas vel lineares transeuntia. Involucra 9 — 

 I0mm late ovato-cylindrica 15 — 20-flora, squamis pallide viridibus sublanceolatis 

 attenuato-obtusis vel acutiusculis apice roseo-purpurascentibus basi ipsa tantum interdum 

 vix parcefloccosis, extimis brevissimis pallide virentibus. Ligulae brevissimae sursum 

 carneo-purpurascentes, stylis lividis. Achaenia 3,5 — 4,5 mm nigra sursum partim 

 attenuata, pappo niveo. 



Neu-Mexiko: Am Südfuß der Pinos Altos Mountains (Greene); El Capitan Mts. 

 in Lincoln Co., 2300 — 2500 m (Earle n. 204); Santa Rita Mts. im Süden der Blake 

 Range, 2300 m (Metcalfe n. 1465)! Südarizona: Huachuca Mountains (Lemmon). 

 — Wooton a. Standley, Fl. N. Mexico (1917) 628. — Juli— Oktober. 



Var. ß. chihuahuense Rob. et Greenm. in Proc. Am. Ac. n. s. XXVJJI. (1904) 

 17. — Folia basalia ad basin petioliformem attenuata, caulina subtus (pariter ac pedicelli 

 et squamae) subfloccosa; ligulae albidae. 



Mexiko: Chihuabua: Sierra Madre (Pringle n. 1315)!, bei der Kolonie Garcia 

 (Nelson n. 6192). 



508. H. prionobium Rob. et Greenm. in Proc. Am. Ac. 1. c. (1904) 17. — 

 Caules 1 — 3 erecti 6 — 8 dm alti, inferne densiuscule et saepe deflexo-pilosi, anthela 

 laxe corymboso-paniculata, pedicellis arcuato-ascendentibus 1 — 3 cm longis subtomentosis 

 et setulosis, capitulis c. 12. Folia radicalia spathulata vel oblanceolata (15 — 20 cm: 

 10 — 25mm) obsolete denticulata utrinque pilosa erecta apice rotund ata; caulina lanceolato- 

 linearia integerrima sessilia acuta (20 — 6 cm: 15 — 3 mm) sparsim floccosa. Involucra 

 8 mm anguste campanulata ad 30-flora, squamis ad 1 4 linearibus acutis nigrescentibus 

 dorso glanduliferis et hirtellis. Ligulae luteae. Achaenia rufo-brunnea sursum parum 

 attenuata, 4 mm, pappo albo. 



Mexiko: Sierra Madre (H. Schultzii Pringle n. 1313; Nelson n. 6128). 



509. H. crepidispermum Fr. Symb. (1848) 146; Epicr. 152; Watson in Proc. 

 Am. Ac. XVIII. 110; Gray I.e. XIX. 70; Hemsl. Biol. Centr.-Am. Bot. II. 259; Rob. 

 et Greenm. 1. c. n. s. XXVIII. 1 8. — Crepis stenotheca Fr. Symb. 1. c. — Heteropleura 

 crepidisperma Sch.-Bip. in Flora XXXXV. (1862) 435. — H. toluccmurn A.-T. in Ann. 

 Jard. Geneve I. (1897) 92. — Sub anthesi hypo- vel aphyllopodum. Caulis 16 — 80 cm 

 tenuis vel plerumque crassus, basi et inter folia inferiora pilis densis deflexis saepe 

 submollibus crinitus, sursum minus breviterque setulosus sub- (interdum usque ad basin 

 parce) glandulosus, sub- (apice densius) floecosus. Anthela racemoso-thyrsoidea vel 

 paniculato-corymbosa saepe elongata, ramis paucis vel ad 1 5 brevibus vel parum elongatis, 

 inferioribus saepe valde remotis arcuato-erectis vel distantibus apice 2- vel corymboso- 

 ad 1 0-cephalis, imis foliis lineari-lanceolatis suffultis, (saepe zb cano-) floccosa minute 

 subglandulosa vix vel sparsim pilosa, pedicellis tenuibus similiter vestitis vel subepilosis 

 canis. Folia pluridenticulata efloecosa margine parce et minute glandulifera, rosularia 

 (ad 13[ — 20] cm longa ad 2 cm lata) lanceolato-oblonga vel late lanceolata in petiolum 

 saepe longum longissime attenuata utrinque pilis tenuiter setosis basi bulbillosis dense 

 et longe vel breviter (= H. ' tolucanum A.-T.) hirsuta vel suberinita, margine costaque 

 dorsali et in petiolo mollius lanata (novella dense longeque lanata), florendi tempore 

 fere semper emareida; caulina ad 8 — 12 submagna elongata oblonga obtusiuscula vel 

 oblongo-lanceolata, inferiora basi attenuata sessilia, media superioraque basi lata vel 

 rotundata subamplexicaulia, supra basin interdum leviter panduriformia, ± acuta, 

 superiora magis remota e basi lata vel ovata lanceolata, omnia utrinque hirsuta costis 

 albidis. Involucra ad 9 — 10( — 12) mm graciliter vel crasse cylindrica (ad 64-flora) sparsim 

 vel modice, rarius subdensiuscule breviter pilosa, glandulosa, basi parcissime floccosa, 

 squamis obscure viridibus dilute marginatis linearibus obtusis vel ± acutis. Ligulae 



