- 151 - 



c. "II. scabri Hook!" in Mns. Ac-ad. Pair, tarn consplcue, ul II. tritlcn- 

 tatttm ab //. vttlgato, diflerunt, ut ad perennem affiniura confusioncm 

 tollcndam seorsim proponere nccesse sit. Caulis in spec, visis longe 

 aphyllopodtis, fulia caulina ovalia, thyrsus longissimus coarctatiis, omnino 

 //. longipili, praecipuas offerunt differenlias. Had!:: unicaulis, hand ro- 

 sulif'era. Caulis. erectus, simplex, tripcdalis, strictus, hirlns, racdio 1'oli- 

 osus, liasi s u rs unique aphyllus. Folia inferiora obovata in peliolum liir- 

 siilissiiniiiii attenuata, rcliqua ovalia, scssilia, siirsiiin decrescentia ; om- 

 nia ulil nsa, denliculata, ciliata ct ulrinqtie pilis albobulbosis scfosa. Thyr- 

 sus discretus, ultra spithamam longtis, valde densus ct coa retains, radii 

 fere glahra. Rami racemose disposili, divaricati, unciales, polycephali, 

 dense glanduloso-pilosi. Involucra cylindrica , pauciflora, glanduloso- 

 pilosa et basi canofloccosa. Ligulac flavae, apice glabrae. Stylus sicci- 

 tate fuligineus. Achacnia longa, gracilia, sui-suin evidentius attenuata, 

 ijiiain in II. mariano, nigrofusca , pappo albo. 



S. StirpS ACCIPITRINELLA. 



Aphyllopoda. Involucra nunc multiflora, mine gracilia 

 praccedentis stirpis, a quo constantcr tantum differunt achaeniis 

 brevioi-ibus , nee sursum attenuatis. Species ceterum inter se di- 

 versissimac ct vix rite a/fines, in remolissimis Americae bore- 

 alis regionibus obviae; at oinnes serotinae. 



K vegctatione //. pcnsilvanicum eliam hue pertinet, ut saepc //. 

 Scouleri ad praecedentia; at characterem ex achaeniis graviorein censeo. 



117. II. SCOULERI (pHAEOTRICnUM), ])SCU(1o-|)li> llojiodllin , pilis ti- 



gidis divergentibus fuscis hispidum, caulc rigido sparsifolio, 

 foliis coriaccis subscssilibus late lanccolatis subintcgcrri- 

 mis acutis, paniculn laxa, pedunculis erectis ramosis, invo- 

 lucrisque ct/lindricis fuscopubescentibus , iminixtis \ulgo pi- 

 lis glandulifcris, achaeniis columnaribus truncatis. 



II. Scouleri. Hook. Dor. Am, p. 298. pr. p. Torr. ct Gray Am. 



lor. p. 478. 



In Americae borealis regionibus maxim c occidentalibus; 

 ad Oregon fluntcn, Nootka; in Waldamct. Aug. Sept. 



II. longipilo simile, at minus, indumento et achaeniis sursum haud 

 attenuatis manifesto diverstim ultima nota ad Accipitrinella abit vel 

 novae stirpis praebet initia. Color pilorum, immo pubis pedunculorum, 



