376 COMPOSITE. Bceria. 



Hills and moist ground, throughout the western part of the State ; the large variety in wet 

 meadows on the coast, from Mariu Co. (Biyelow) to Humboldt Co. (JJolander, Kelloyg, &c.), pass- 

 ing into the ordinary form. The opposite depauperate extreme is common farther south and in 

 the interior, probably in sterile soil, with filiform stems only 3 or 4 inches high, and the scales 

 of the involucre and rays reduced to 5 or 6, the latter only 2 lines long. Akenes narrow, some- 

 times sparsely dotted, sometimes thickly beset with minute glands or glandular points. Style- 

 appendages truncate-capitate. 



2. Pappus present and of 2 to 5 (rarely 8) uniform awns or awned chaffy scales 

 (or rarely wanting} : akenes truncate at the apex ; minutely cinereous-puberu- 

 lent : leaves exceptin B. platycarpha entire. (Burrielia, DC., mainly.) 

 * Chaffy scales of the pappus entire. 



2. B. gracilis, Gray, 1. c. Closely resembles the preceding, but smaller than 

 its larger forms, a span or more high, branching freely : scales of the involucre 10 

 to 1 4, oblong-lanceolate : rays as many, oval or oblong : receptacle very narrowly 

 conical, acute : akenes slender : pappus in the ray of 2 or 3, in the disk of 4 or 5 

 awns, with a subulate or lanceolate chaffy-dilated base. Burrielia gracilis, DC. 

 1. c. ; Hook. Bot. Mag. t. 3758. 



Open ground, apparently common from San Francisco Bay southward. Rays 3 or 4 lines 

 long. Awns of the pappus sometimes veiy little dilated at base. 



3. B. teneriima, Gray, 1. c. Like the preceding or usually smaller and more 

 slender : scales of the involucre and rays 5 to 9 or 10 : receptacle rather broadly 

 conical and hardly acute : slender awns of the pappus 2 or more from a broad and 

 ovate chaffy base. Burrielia tenerrima, DC., probably. B. parviflora, Nutt. 1. c. 

 B. longifolia, Nutt. 1. c. 1 ? 



From the Sacramento southward through the State, and in Arizona. Distinguished from the 

 preceding chiefly by the broad and short scales of the pappus ; probably passing into it. 



4. B. platycarpha, Gray, 1. c. A span high, slender, loosely branching, 

 slightly pubescent : leaves narrowly linear and entire, or some of them 3-cleft : 

 peduncle mostly thickened next the head : scales of the involucre 6 or 7, ovate, 

 distinctly 3-nerved : rays as many, oblong : receptacle acutely conical : akenes cune- 

 ate-linear : pappus both in ray and disk of 7 or 8 firm oblong-ovate chaffy scales, 

 tipped with a slender awn of about the same length. Burrielia platycarpha, Gray 

 in Bot. Mex. Bound. 97. 



Valley of the Sacramento, Stillman. A slender form also collected by Rattan. Scales of the 

 involucre 4 lines long in the principal specimens. Style-appendages truncate or very obtuse, but 

 surmounted by a short abrupt cusp. 



* % Chaffy scales of the pappus laciniate. 



5. B. Falmeri, Gray. Dwarf, less than a span high, rather stout, diffusely 

 branched from the base, hirsute-pubescent : leaves linear, thickish, all entire : 

 peduncle thickened under the head : scales of the involucre 9 or 10, ovate, thickish- 

 herbaceous, with midrib carinate-thickened and salient at base, and lateral nerves 

 indistinct : rays as many, oval, rather short : receptacle obtusely conical : akenes 

 linear and slightly narrowed below : pappus of 5 (or sometimes more) broadly ovate 

 fimbriate-laciniate scales, those of the disk with a stout awn, of the ray mostly blunt 

 and awnless. Proc. Am. Acad. ined. 



Guadalupe Island, off Lower California, Dr. E. Palmer. Introduced to complete the account 

 of the genus. Head 3 lines high and broad : rays 2 lines long. 



3. Pappus of truncate or pointless short chaffy scales between 2 or 3 au'ned ones or 

 naked awns, or sometimes wanting : akenes truncate at the apex : receptacle 

 obtusely conical : leaves or some of the lowermost laciniately cleft or pinnati- 

 fid. DICH^ETA, Gray. (Dichasta, Nutt. 1. c.) 



6. B. maritima, Gray. Low and diffuse, pubescent when young with loose 

 cobwebby hairs, becoming nearly glabrous : leaves oblong-linear or lanceolate, entire, 



