Ridddlia. COMPOSIT.E. 317 



Tribe YI. HELEXIOIDE.E, p. 70. 



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

 Medicinal Plant* of the U. S.)— Bot. Mex. Bound. 9-3: Benth. & Hook. Gnu. 

 ii. 413, & le. PI. xi., partly. (The exeludeil C. aunnitiaca. Benth. le. PI. 1. 1104, 

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



C. SUaedsefolia, Gray, 1. c. SufEruticose, a foot high, -n-ideh- branching, not punctate nor 

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

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

 ers doubtless yellow.— Benth. Ic. PI. t. 1105.— S. Texas; on the Kio Grande at Laredo, 

 Bcrlandier. Alkaline flats of the Pecos, Havard. 



1 29. JAtJME A, Pers. (I H. Jaume St. HUaire, a French botanist.) — 

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

 and terminal ijedunciilate heads of yellow flowers. — .Svii. PI. ii. .31)7 ; Benth. 

 & Hook. Gen. ii. 3'J7 including Colaogyni', Less.. Eapejoa., DC. ChcBthymenia, 

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



-J. carnosa, Gkat. Procumbent or ascending perennial herb, fleshy, glal irons, leafy to the 

 short-peduncidate head: leaves spatulate-linear, almost terete, about inch long: head half- 

 inch long, Hesliy : rays 6 to 10, linear, not snTpa,ssing the disk: receptacle conical: akenes 

 glabrous, destitute of pappus. — Wilkes Exped. xvii. 360, & 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 ; probablj- first coU. by Chamisso. 



130. VENEG-ASIA, DC. {Michael Venegas, a .Jeniit mi^innary. early 

 writer upon California.) — Prodr. v. 43; Benth. 6c Hook. Gen. ii. o'J7. — Single 

 species, yellow-flowereil. 



'S]'. carpesioides, L)C. 1. c. Large perennial herb, with glabrous leafy branches : leai es 

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

 somewhat puberulent or atomiferous : heads terminal and from upper axUs, short-peduncled, 

 inch broad, and the about 1.5 rays an inch long. — Gray, Bot. Calif, i. 372. Purtlieniopsis 

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

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



131. RIDDfiLLIA, Nutt. (Prof. John L. Riddell, author of a Synop.sis 

 of the Flora of Western States.) — Low and corymbosely branched wooUy 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 § Diphthrix 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. Soe. n. ser. vii. 371 ; Gray, PL Fendl. 94, & Bot. Calif, i. 372. 

 Psilostrophe, DC. Prodr. vii. 261. 



at P.av? at maturity half-inch long : akenes and pappus glabrous, or the former -mth. few and short 

 scattered hairs: perennial. 

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

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

 numerous, mostlv cymosely clustered and short-peduucled : paleae of the pappus oblong- 

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

 in Emorv Rep. t. 5; Gray, PI. Fendl. 94. — T\". Texas to E. Colorado and Arizona; first 

 coU. by James. 



