376 COMPOSIT.E. Boeria. 



Hills ftiul moist giouml, thiou^'hout the western i)ait of the State ; the huge viuiety in wct 

 niciiilowfl on tlio (toiwt, lioni Miiriu Co. {Jliyduw) to lluuibohlt Co. {BoIuikI'i; Kcllo(j<j, &e.), luus.s- 

 insr into iho onlinuiy I'min. The opiiosile ihiiumiiemto extreme is conimon t'luiher mnitli and in 

 tlie inleiior, iiioluilily in wleiile Hoil, with iililonn stems only a or 4 inches iiigh, and the wales 

 ol" the involiii'ie and rays reiluced to 5 or li, the hitter only 2 lines long. AkiMies narrow, .some- 

 times bjiai'sely dotted, sonielimes thickly heset willi minute ghuuls or gliindular fioints. Style- 

 ajipendayes truntalo-eapituto. 



§ 2. Fappus present and of 2 to 5 {rarely 8) uniform awns or aivned chajfi/ scales 

 (or rarely wantuu/) : akenes truncate at the apex ; minutely cinereous-puberu- 

 lent : leaves except in B. plat year pha entire. {Burrielia, DC, mainly.) 

 •A Chaffy scales of the pappus entire. 



2. B. gracilis, Gmy, 1. c. Closely resembles the precediii'^', but smaller than 

 its larger I'unus, a span or more high, branching ircely : scales of the involucre 10 

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

 conical, acute : akenes slender : i)ai)pus in the ray of 2 or 3, in the disk of 4 or 5 

 awns, with a subulate or lanceulate chally-dilated base. — Burrielia gracilis, DC. 

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



Open ground, aijjiarently eommon I'rom San Francisco 15ay southward. Itays 3 or 4 lines 

 long. Awns of the luiiipiis sometimes very little dilated at hase. 



3. B. tenerrima, Cray, 1. c. Like the preceding or usually smaller and more 

 Blonder: acalea of the involucre and rays 5 to I) or 10: receptai'le rather hinadly 

 conical and hardly acute : sh-niler awns of the pappus 2 or more from a broad and 

 ovate cliaify base. — Burrielia teneii-ima, DC, probably. B. parvijiora, IS'utt. 1. c. 

 B. lonyifolia, Nutt. 1. c.1 



Y\Q\\\ the Sacramento southward through the State, and in Arizona. Distinguished horn the 

 preceding chielly by the broad and short scales of the jjajjiius ; probably passing into it. 



4. B. platycarpha, Gi-ay, 1. c. A span high, slender, loosely branching, 

 slightly pubescent : leaves narrowly linear aiul 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 chaily scales, 

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

 in Dot. Mex. Bound. 97. 



Valley of tiie S.ieramento, Stillman. A slender form also (collected by Fuiltun. Scales of tlie 

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

 sunnounted by a short abrupt cusp. 



* * Ch((ffy scales of the pappus laciniate. 



f). B. Palmei'i, Cray. Dwarf, less than a si)an high, rather stout, dill'iisely 

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

 peduncle thickened under the head : scales of the involucre 9 or 10, ovate, thicki.sh- 

 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 

 limbriate-laciniate scales, those of the disk with a stout nwn, of the ray mostly blunt 

 and awniess. — Proc. Am. Acad. ined. 



r.uailalupo Island, olf bowiir California, 7/r. E. Palmer. Introduced to comi'leto the account 

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



§ 3. Papptis of truncate or pointless short chaffy scales between 2 or 3 awned ones or 



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



obtusely conical : leaves or some of the lowermost laciniately cleft or j^i'i^ati- 



fid. — DiciiJJTA, Gray. (Dichata, 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. 



