STYtocLiNE COMPOSITiE 325 



PBILOCABPHUS 



gon and California. 



26 STYLOOLINE Nutt. Trans. Am. Phil. Soc. viii, 338. 



Low floccose-woolly annuals with entire alternate leaves and 

 small heads of inconspicuous flowers in glomerate clusters. 

 Heads many-flowered; the pistillate flowers with filiform corolla, 

 several or many, in two or many series on the columnar receptacle, 

 each with the ovary and achene loosely enclosed in the base or 

 body of an ovate broadly boat-shaped chafi" or scale of the recepta- 

 cle, of scarious or firmer membranaceous texture : the hermaphro- 

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

 the receptacle, involucrate but not enclosed by the 4 or 5 merely 

 concave scales of the receptacle, their tubular corollas 4-5-toothed 

 Bracts of the involucre hyaline and inconspicuous or hardly any. 

 Achenes obovate or oblong with a narrow base, slightly oblique 

 or straight, the areola terminal. Pappus none to the achene, 

 commonly a few caducous scabrous bristles around the sterile 

 flowers. 



Ours all of § ancistrocarphus Gray. Fertile flowers 5-10, their 

 chafiy scales in not more than two series, boat-shaped and invol- 

 ving the achene, of firm-membranaceoxis texture, and with a 

 rigid incurved hooked cusp, persistent and at length stellately 

 spreading. 



S. fllaginea Gray f roo. Am. Acad, viii, 652. Caneacent with a fine 

 and appresBsd wool:.stems slender, 1-10 inches high, erect or diffuse and 

 branching from the base : leaves narrowly linear or somewhat dilated up- 

 ward, 6-8 lines long: involucre outside ef the woolly fructiferous scales 

 obscure or none: pappus to sterile flowers none. On dry stony hillsides 

 southwestern Oregon and California. 



27 PSILOCARPHUS Nutt. 1. c. 



Low flbccose- woolly annuals with entire mostly opposite leaves 

 and small heads of inconspicuous flowers in terminal capitate 

 clusters and in the forks of the branching stems, involucrate by 

 the upper leaves. Heads discoid, many-flowered ; the pistillate 

 flowers ,with filiform corolla, numerous, in several series on the 

 depressed-globose receptacle, each loosely enclosed in an obovate 

 or semicordate hooded-saccate visiccular or inflated chaff or scale 

 of membranaceoucS texture clothed with soft wool, its apex in- 

 trorse and more or less beaked with a hyaline scale ; the her- 

 maphrodite but sterile flowers few and naked in the centre, with 

 tubular 4-5-toothed corolla. Bracts of the involucre few, small, 

 scarious. Achenes oblong or cylindraceous and moderately com- 

 pressed, straight, small and loose in the sack of the scalp, which 

 is more or less open down the inner face. Pappus none. 



* Leaves all tapering below ; the midrib not prominent : canesoent 

 with close wool throughout : fructiferous bracts not over a line long. 



