Evax. COMPOSITE. 337 



1. Fertile flowers numerous ; their chaffy subtending scales imbricated in many 

 series in an ovoid head, thin, wholly or partly hyaline, those next the sterile 

 jloivers narroiver but similar : pappus commonly present to the sterile flowers. 



EUSTYLOCLIXE, Gray. (Stylodine, Xutt.) 



1. S. gnaphalioides, Xutt. A span or less in height, loosely white- woolly, 

 diffusely branched : leaves broadly linear or the upper oblong, obtuse (barely a 

 quarter of an inch long) : fructiferous scales lightly woolly on the back, broadly 

 ovate, a firmer central portion at the base saccate and enclosing the akene ; the 

 remainder barely concave and hyaline. Pacif. E. Eep. iv. 101, t. 13. 



Open grounds, from the Stanislaus to Monterey, Nuttall, Andrews, Bigelow. Seldom collected ; 

 apparently not common. 



2. S. micropoides, Gray. Lower : leaves linear and somewhat lanceolate, 

 acute : fructiferous scales ovate, with the whole lower portion boat-shaped and 

 involving the akene, very woolly on the back, except the upper expanded hyaline 

 portion. PI. Wright, ii. 84. 



Southeastern borders of California on the Colorado Eiver (Newberry), and through Arizona and 

 New Mexico. 



2. Fertile flowers 5 to 10; their chaffy scales in not more than two series, boat- 

 shaped and involving the akene, of firm membranaceous texture and with a small 

 hyaline tip, as in Psilocarphus ; the 5 uppermost scales sterile and larger, 

 forming an involucre round the sterile flowers, herbaceo-coriaceous, open, tapering 

 into a rigid incurved hooked cusp, persistent and at length stellately spreading. 



ANCISTROCARPHUS, Gray. 



3. S. filaginea, Gray, 1. c. A span or less high, slender, erect, canescent with 

 fine and appressed wool : leaves narrowly linear or somewhat dilated upward : invo- 

 lucre outside of the woolly fructiferous scales obscure or none : pappus to sterile 

 flowers none. Ancistrocarphus fllagineus, Gray, Proc. Am. Acad. vii. 356. 



Mendocino Co., at Round Valley, Eel River, Bolander. This curious little plant has the 

 aspect of Filayo Gallica : the heads are inconspicuous : the most prominent parts when developed 

 are the rigid sterile scales (about 2 lines long) with their hooked tips, adapted to attach the 

 small plants, at maturity, to the fleece of sheep or the coat of cattle. 



32. EVAX, Gajrtn., subgenus HESPEREVAX, Gray. 



Head discoid, many-flowered j the pistillate flowers with filiform corolla in sev- 

 eral series on a convex villous and centrally elevated columnar receptacle, each 

 subtended by an ovate barely concave chartaceous chaffy scale : hermaphrodite but 

 sterile flowers several (6 to 10) on the apex of the column of the receptacle, in- 

 volucrate by a whorl of 3 to 5 thicker chafly scales. Scales of the involucre 

 few and resembling the chaff of the receptacle. Akenes obovate-oblong with a 

 narrowed base, straight, more or less compressed parallel to the subtending chaff, 

 very smooth. Pappus none. Gray, in Pacif. E. Eep. iv. 101, t. 11 ; Proc. Am. 

 Acad. vii. 356, & viii. 651. 



Evax is an Old-World genus, to which is appended this peculiar Californian type, apparently 

 of a single species. 



1. E. caulescens, Gray, 1. c. Low annual, one to three inches high, branching 

 from the base, densely Avhite-woolly : leaves spatulate, with blade a quarter to 

 nearly an inch in length, tapering into a slender petiole : heads inconspicuous in 

 sessile terminal or axillary clusters, or solitary, a line or two in length : chaffy scales 

 of the receptacle becoming rigid, those surrounding the sterile flowers thicker and 

 woolly inside. Psilocarphus caulescens, Benth. PI. Hartw. 319. 



