1848.] 



21 



ate along the margin of the narrow scales, all terminating in awns, excepting the 

 rays, which have the same short awnless pappus as in the preceding. 



Hab. With the former. That these are true species, as well as the one 

 which I called P. coronaria, I am persuaded by the fact of their retaining 

 tiie same relative character when cultivated. 



HEMIZONIA. 



H. *decumhens. Annual, hirsute, pubescent; heads nearly solitary at the 

 summit of the branches; leaves entire, linear, rather obtuse; rays 10 to 15, cu- 

 neate, 3-Iobed ; achenia rugose, with a short, curved beak; pappus of the disk 

 flowers none. 



Hab. Near Monterey. A good deal resembling H. fascicu/ata. 



§. Heads hemispherical, many-flowered, corymbose; rays 20— 25, receptacular 

 chaff", in a single series, not united ; pappus none ; leaves pinnatifid. — Madiomeris. 



H. *macrocephala. Annual ? hirsute ; leaves irregularly pinnatifid, acute, 

 upper ones entire and sessile ; flowers subcorymbose, head hemispherical, many- 

 flowered ; rays 20 to 30, cuneate, 3 lobed; achenia incurved, rugulose, with an 

 oblique apex and stipitate at the base. 



Hab. At St. Simeon, Upper California. 



MONOLOPIA. 



M. *la:iceolata. Young branches and leaves at first somewhat tomen- 

 tose, 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 8, ovate, divided nearly to the base; 

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

 with projecting papillfe. 



Hab. Pueblo de los Angeles, Upper California. Flowering in April, 



ERIGERON. 



E. ^stenophyllum. Nearly smooth, stem even and cylindric, corym- 

 bose at the summit ; leaves filiform, rather numerous and scattered, minutely 

 scabrous ; involucrum about 3 series, scales linear-lanceolate, acute ; rays nu- 

 merous, elongated, (30 or more.) 2 to 3-toothed ; pappus fulvous, scabrous, with 

 an outer short white series ; achenia nearly smooth and compressed. 



Hab. In California, (Monterey ?) 



CH.^NACTIS. 



C. *denudata. Biennial; glandularly pubescent; peduncles exceedingly 

 long; involucrum viscidly pubescent, rather tomentose; scales linear-lanceo- 

 late; ray-flowers irregular, expanded, shorter than the disk. 



Hab. Pueblo de los Angeles, Upper California. 



DIETERIA. 



S. Involucrum hemispherical, the scales linear and acute ; achenia obovoid and 

 compressed, in the young state with numerous striatures, at length covered with 

 a silky villus; pappus of several series of unequal scabrous bristles, the outer 

 series shorter and more slender, (those in the lay, as in the rest of the genus, much 

 shorter and less numerous.) Biennial or perennial, leaves pinnately lobed or 

 incised ; the lobes ciliated or pointed with bristles. Receptacle fimbrillate or 

 chaffy. Flowers of one colour.— SiDERANTHL'S. (Perhaps a genus.) 



