Riddellia. COMPOSITE. 317 



TRIBE VI. HELENIOIDE^E, p. 70. 



128. CLAPPIA, Gray. (Dr. A. Clapp, author of a Synopsis of the 

 Medicinal Plants of the U. S.)--Bot. Mex. Bound. 93; Benth. & Hook. Gen. 

 ii. 413, & Ic. PL xi., partly. (The excluded G. aurantiaca, Benth. Ic. PI. t. 1104, 

 is a Dysodia, apparently wanting the oil-glands.) Single species. 



C. SUSedsefolia, GRAY, 1. c. Suffruticose, a foot high, widely branching, not punctate nor 

 glandular: leaves alternate, fleshy, terete, linear, entire, or the lower pinnately 3-5-parted, 

 sessile: head (half-inch in diameter) pedunculate, terminating herbaceous branchlets: flow- 

 ers doubtless yellow. Beuth. Ic. PL t. 1105. S. Texas; on the Rio Grande at Laredo, 

 Berlandicr. Alkaline flats of the Pecos, Ilarurcl. 



129. JAtJMEA, Pers. (I H. Jaumc St. Hilaire, a French botanist.) 

 Herbs or suffruticose plants (mainly S. American) ; with opposite entire leaves, 

 and terminal pedunculate heads of yellow flowers. Syn. PL ii. 397 ; Benth. 

 & Hook. Gen. ii. 397 (including Coinoy//ne, Less., Espejoa, DC., Chcethymenia, 

 Hook. & Arn., &c.) ; Gray, Bot. Calif, ii. 371. Kleinia, Juss., not L. 



J. camosa, GKAY. Procumbent or ascending perennial herb, fleshy, glabrous, leafy to the 

 short-pedunculate head: leaves spatulate-liuear, almost terete, about inch long: head half- 

 inch long, fleshy : rays 6 to 10, linear, not surpassing the disk: receptacle conical: akenes 

 glabrous, destitute of pappus. Wilkes Exped. xvii. 300, & Bot. Calif, i. 372. Coinogyne 

 carnosa, Less, in Linn. vi. 520; Torr. & Gray, Fl. ii. 410. Salt marshes and sea-beaches, 

 Brit. Columbia to California; probably first coll. by Chamisso. 



130. VENEG-ASIA, DC. (Michael Venegas, a Jesuit missionary, early 

 writer upon California.) --Prodr. v. 43; Benth. & Hook. Gen. ii. 397. Single 

 species, yellow-flowered. 



V. carpesioid.es, DC. 1. c. Large perennial herb, with glabrous leafy branches: leaves 

 alternate, slender-petioled, membranaceous, ovate and subcordate, mostly denticulate, veiny, 

 somewhat puberuleut or atomiferous : heads terminal and from upper axils, short-peduncled, 

 inch broad, and the about 15 rays an inch long. Gray, Bot. Calif, i. 372. Partheniopsis 

 maritima, Kellogg, Proc. Calif. Acad. v. 100. Rocky banks of streams, coast of California, 

 from Santa Barbara southward ; first coll. by Doufjlas and Coulter: fl. summer. 



131. RIDDELLIA, Nutt. (Prof. John L. Riddell, author of a Synopsis 

 of the Flora of Western States.) Low and corymbosely branched woolly herbs 

 (Texano-Arizonian) ; with alternate and spatulate or linear leaves, the cauline 

 entire, and small heads of yellow flowers ; the ligules large in proportion, becom- 

 ing pale or whitish in age and thin-papery ; fl. summer. In habit not unlike 

 Zinnia Diplothrix of the same regions. Bracts of the involucre distinct, but 

 connivent-erect, and connected by the intricate wool so as to seem connate. - 

 Trans. Am. Phil. Soc. n. ser. vii. 371 ; Gray, PL Fendl. 94, & Bot. Calif, i. 372. 

 Psilostrophe, DC. Prodr. vii. 2G1. 



* Rays at maturity half-inch long: akenes and pappus glabrous, or the former with few and short 

 scattered hairs: perennial. 



R. tagetina, NUTT. 1. c. Loosely or somewhat villosely lanate, sometimes glabrate in age, 

 rather widely branched : radical and even lower cauline leaves often laciniate-pinnatifid : heads 

 numerous, mostly cymosely clustered and short-peduncled : palea; of the pappus oblong- 

 lanceolate, entire, usually obtuse, half or three-fourths the length of the disk-corolla. Torr. 

 in Emory Rep. t. 5; Gray, PI. Fendl 94. W. Texas to E. Colorado and Arizona; first 

 coll. by James. 



