1 130 K - H - Zahn. — Hieracium. 



549. H. oregonicum Zahn. — H. barbigerum Greene in Pittonia III. (1897) 228; 

 How. Fl. N.-W.-Am. I. (1903) 396; nee Stenstr. — Pluricaule, rhizomate terrae pro- 

 funde inserto. Caules 10 — 30 cm, hypopbyllopodi, basin versus saepe conferte foliati 

 sursum scapiforrnes. Folia lanceolata vel spathulata breviter petiolata, acuta, margine 

 integro longe patenti-hirsuta, utrinque pariter ac caulis minus pilosa, subtus densissime 

 floecosa. Anthela laxa 3 — 5-cephala cum caule disperse pilosa, pedicellis elongatis. 

 Involucra campanuliformia c. 8 — 10 mm longa 15 — 30-flora floccis subtomentosula et 

 pilis subobscuris setulosis hirsuta, squamis linearibus. Achaenia columnaria. Pappus albus. 



Pazifisches Nordamerika: Von Ashland Butte in Oregon bis Lassen's County in 

 Kalifornien. 



550. H. hemipoliodes Zahn. — H. cinereum Howell, Fl. N.-W.-Am. I. (1903) 

 396; nee Tausch. — Cinereum, floccis minutis albis obtectum. Caules complures 15 — 

 25 cm alti basin versus tantum foliati (bypophyllopodi). Folia lanceolata vel angustiora 

 acuta vel acuminata 7,5 — 10 cm longa sparsim denticulata, in petiolos late alatos 

 attenuata, pilis crispis sparsim hirsuta. Anthela conferte corymboso-paniculata oligo- 

 vel pleiocephala. Involucra 10 — 12 mm vix vel sparsim hirsuta (tomentosulo-floccosa), 

 squamis linearibus margine late scariosis, externis (brevibus) subulatis. Achaenia colum- 

 naria. Pappus sordidus. 



Pazifisches Nordamerika; Table Rock in Clackamas County in Oregon. 



551. H. Howellii Gray in Coult. Bot. Gazette XIII. (1888) 73; How. Fl. N.-W.- 

 Am. I. (1903)396. — Caulis3 — 6 dm dense floecosus inferne hirsutus phyllopodus 

 subscapiformis. Folia spathulata vel oblanceolata haud vel interdum sparsim denticu- 

 lata 7,5 — 10 cm longa obtusa in petiolum brevem attenuata, caulina pauca vel ses- 

 silia, omnia utrinque subcanofloecosa villoso-crinita. Anthela laxe paniculata pleiocephala. 

 Involucra 10 mm 5 — 1 5-flora cylindrica, squamis longioribus 6 — 8 lineari-lanceolatis 

 obtusis, externis paucis, omnibus dense floecosis epilosis. Achaenia vix vel sursum 

 parum attenuata, pappo (initio) albo. 



Pazifisches Nordamerika: Mooney Mountain in Josephine County in Oregon. 



552. H. Rydbergii Zahn. — H. griseum Rydb. in Mem. N.-York Gard. I. (1899) 

 464. — Caulis phyllopodus vel hypophyllopodus gracilis vel crassiusculus ± vel dense 

 floecosus, ubique dz dense setosus (2 — 4 mm) vel sursum zt glabrescens, basi ohvacea 

 saepissime densius setosus, 4 — 8 dm altus; anthela racemoso-thyrsoidea canotomentosa 

 modice vel dense pilosa, acladio brevi, ramis 8—15 saepe eglandulosis, summis con- 

 fertis, reliquis remotis brevibus 1 — 3-cephalis vel 1-cephalis (capitulis reliquis abortis), 

 pedicellis brevissimis saepe minute glandulosis. Folia lanceolata vel angustiora saepe 

 valde elongata ad basin latissime alatam longe attenuata utrinque modice vel densius- 

 cule floecosa et =b dense setosa (2 — 3 mm), haud vel subdenticulata; radicalia florendi 

 tempore plerumque emareida, caulina ad 1 8 longa, superiora magis remota cito minora 

 lineari-lanceolata densius floecosa in bracteas transeuntia, inferiora approximata ereeta 

 sensim minora (ad 16 : 1,5 cm). Involucra 8,5 — 10 mm crasse ovato-cylindrica dense 

 vel densissime minute glandulosa subcanofloecosa disperse vel modice pilosa, squamis 

 sublatiusculis obtusis vel obtusiusculis obscuris late dilute marginatis, extimis dilutioribus 

 sublaxis. Ligulae subbreves luteae. Styli brunneo-lutei vel livescentes. Achaenia fusca, 

 3,5 mm, sursum parum attenuata. 



Idaho: Henry's Lake, 2650 m (A. Rydberg, Expl. of Montana and Yellowstone 

 Park n. 5309)! 



553. H. horridum Fr. Epicr. (1862) 154; A.-T. Spicil. (1881) 19. — Pilosella 

 horrido, Sz. Sz. in Flora (1862) 439. — Phyllopodum, pluricaule, ubique pilis longis 

 albis (manifeste dentatis subplumosis exsiccatione rufescentibus) dense crinitum vel 

 lanatum. Caulis 1 — 4 dm gracilis subfractiflexus densissime pilosus (3 — 4 mm) superne 

 niinutissime et sparsim vel subglandulosus, usque ad apicem foliosus. Anthela in- 

 determinata thyrsoidea vel paniculata ramosissima polycephala subeglandulosa sed dense 

 et brevius hirsuta, ramis ad 10, summis confertis subeymosis, inferioribus valde remotis 

 interdum ex omnibus axillis ortis erectis foliolis hirsutissimis obsitis thyrsoideo- oligo- 



