PLANTS COLLECTED BY DR. GAMBEL. 175 



manner of those of the ray in the MADiEJi;, and that though provided with a short 

 style they are infertile. 



HEMIZONIA. 



H. *DECUMBENS. Annual, hirsute, pubescent; heads nearly solitary at the summit of the branches ; leaves 

 entire, linear, rather obtuse ; rays ten to fifteen, cuneate, three-lobed ; achenia rugose, with a short 

 curved beak ; pappus of the disk flowers none. 



A good deal resembling H. fasciculata, but in the two specimens from which I 

 have described, the leaves appear to be all entire. About a foot high and rather 

 decumbent. The flowers yellow, rather scattered, disk flowers enclosed in a cup 

 formed by the -union of the inner row of receptacular carinate scales. Stigmas 

 filiform, branchlets and involucrura sprinkled with resinous glands. 



Hab. Near Monterey, California. 



§. Madiomeris. Heads hemispherical, many flowered, corymbose ; rays twenty to 

 twenty -five, receptacular chaff", in a single series, not united ; pappus none ; leaves 



pinnatifid. 



H. *MACR0CEPnALA. Anuual? hirsute; leaves irregularly pinnatifid, acute, upper ones entire and sessile ; 

 flowers subcorymbose, head hemispherical, many-flowered ; rays twenty to thirty, cuneate, three- 

 lobed ; achenia incurved, rugulose, with an oblique apex and stipitate at the base. 



About a foot high, more or less clad with long hirsute hairs. Flowers about the 

 size and appearance of those of Madaria elegans, bright yellow. Stigmas very long 

 and filiform in the rays, in those of the discal florets hispid and much shorter. 

 Achenia convex externally, and rugulose internally, angular, with a short incurved 

 beak, having a circular cicatrice, and attenuated into a slender stipe at the base. 

 Discal florets densely bearded or fimbriate along the margin of the dentures, their 

 infertile germs oblanceolate and flat. Anthers with broad ovate cups. Leaves of 

 the involucrum linear-lanceolate, leafy and very hairy. 



Hab. At St. Simeon, Upper California. 



MONOLOPIA. 



M. *LANCE0LATA. Young branches and leaves at first somewhat tomentose, at length nearly smooth ; leaves 

 oblong-lanceolate, distantly and irregularly toothed, sessile, all alternate, above entire and 

 amplexicaule, acute ; peduncles tomentose; leaves of the involucrum usually eight, ovate, divided 

 nearly to the base ; rays a little longer than the disk; florets all fertile; receptacle conic, smooth, 

 with projecting papillte. 



A tall stout annual herb, two feet or more in height, and considerably branched, with 

 much the aspect of Chrysanthemum segetum. Leaves two to four inches long, the 



45 



