o^^ CUiMPUSlT.E. J'sUucaqjhus. 



30. PSILOCARPHUS, Nutt. 



Head discoid, inuiiy llowcrcil ; tiiu pistilluto lluwcrs with liliform cuvullu, imuicr- 

 oua (20 to 40, mruly 10 to 12), in sevisrul serioa on the doproaaod-globular rt'ciiittiiclo, 

 ouch looacly uiicloacd in uii obovuto or Buuii-obconluto lioodud-aiiccutu vuaicuiur or 

 iiilliiUid chilli' *•!' in:a\v, ('li)tli(id with aol't wool, (jC iiioiiibntiiuccoua tuxtiiic, ita a|i«x 

 iiili'orao and luoio or Icks beaked with a hyahiiu hcuIo ; thu hcriuaphrodilu but Htoiihi 

 Ihiwcra linv and iiukcil in tho ccntio, witii tubidar -1 - 0-toothud corolla. Hi.'alcH ol' 

 thu iuvubiciu lew and auiall, Hiaiiuiis. AUciio idiluug or c) lindiacoous and luodcr- 

 aliily coiupressed, straight (ita small areola tenninal), small and loose in the sac of 

 tilt: bcale, wliich In inoiv. or ]e»* ujm.-ij dtnvii the iiiiicr lace. i'ii\)\tU6 none. — Low 

 and mostly depressed lloccose-woolly annuals, with entire leaves, which are mainly 

 opposite ! Heads small, in terminal capitate clusters and in the forks of the branch- 

 ing stems, involucrate by the upper leaves. — Gray, Proc. Am. Acad. viii. G52. 



Peculiar to Oregon and Ciiliforiiia, and one or two species in Chili. Oui-s appear to be redu- 

 cible to two, bom the tirst of which the Chilian F. (jlobifcrus dillerb, perhaps too slightly, in ita 

 broader leaves and proportionally wider as well as smaller akenes. 



1. P. Oreganus, Nutt. Beset with loose Avhito wool, especially the heads, 

 becoming dilluaely branched, mostly forming spreading tufts : loaves linear t»r the 

 uppermost narrowly oblong : ukenes cylindraceous and slightly compressed, about 

 three fourths of a line long. — F. yluhiferus, Nutt. excl syn. ; a loose woolly form. 

 F. brevissimus, Nutt. ; dwarf-depauperate state of the same. F. Oreyanus, Nutt. ; a 

 state with the white woolliness somewhat appressed. 



Var. elatior, Gray, 1. c. : the most remarkable form, probably an unusually 

 luxuriant condition, a span high, almost erect, with leaves nearly an inch long, and 

 the cluster of heads large in proportion ; as yet found only at Portland, Oregon. 



Santa Barbara to Oregon near the coast, in low grounds along streams. 



2. P. tenellus, Nutt. Canescently tomentose with finer and more a])pressod 

 wool, which soon detaches from the slender or liliform dilfusely very much branched 

 stems, forming prostrate tufts a span or two in diameter : lower leaves spatulate- 

 linear and the upper spatulate : heads smaller, in fruit 2 or 3 lines in diameter, but 

 the fertile flowers fpiite as nunuuous : akenes fusiform-oblong, half a line long. 



Low grounds, common bom Sun Francisco, &c., southward. 



3L STYLOCLINE, Nutt., char, cvtcmlcd. 

 Head discoid, many-Uowereil ; the pistillate llowers with liliform corolla, several 

 or many in 2 or many scries, on the columnar receptacle, each with the ovary and 

 akene loosely enclosed in the base or body of an ovate broadly boat-shaped clialf or 

 scale of the receptacle, of scarious or firmer membranaceous texture ; the hermaphro- 

 dite but sterile flowers few in the centre, on the narrow sumnnt of the receptacle, 

 involucrate but not enclosed by 4 or 5 merely concave scales of the receptacle ; 

 their tubular corollas 4-5-toothed. Scales of the involucre hyaline and incon- 

 8l)icuous, or hardly any. Akenes obovate or oblong with a narrow base, slightly 

 oblique or straight ; the areola terminal. Pappus none to the akenes, ci)mmonly 

 a few caducous scabrous bristles around the sterile llowers. — Low lioccose-woolly 

 annuals, Avith entire and alternate leaves (in the manner of the tribe), and small 

 heads in glomerate clusters. In affinity intermeiUate between the preceding genera 

 and the next : Western Nortli American, with one species in Alfghanistan. — 

 (.Iray, 1. c. Micrapus § 3 & § 4, Benth. & Hook. 1. c. 



