Guardiola. COMPOSITE. 237 



many, long and slentler: akoncs 4-si(lecl, glabrous. — Fl. Dan. t. 728; Lam. 111. t. 680; 

 Sibtli. n. Gra;c. t. 873. — Road.sidos and pastures, escaped from gardens, and well established 

 in the older States. (Xat. from Eu.) 



63. ADENOCAtTLON, IIoolv. ('ASrir, a gland, and KavXo?, stem.) — 

 Perennial herbs ; with alternate and dilated leaves on long and margined ^letioles, 

 slender stems naked and paniculately branched above, and bearing very small 

 heads of whitish flowers ; the pednncles, &c., beset with stalked glands (whence 

 the name) like those of the akenes bnt less stout. Floccose wool caducous, 

 except on the lower face of the leaves. — Ilook. Bot. Misc. i. 119, t. 15, & Fl. i. 

 308; Maxim. Fl. Amur. 152; Gray, Proc. Am. Acad. viii. G53, & xvii. 214. 



A. bicolor, Hook. 1. c. Stem 1 to 3 feet high, leafy below : leaves ample, deltoid-cordate, 

 coarsely sinuate-dentate or rcpand or slightly lobed, early glabrate and greeu above, white 

 with the thin cottony wool beneath : bracts of the involucre 4 or .5 in a single series, ovate, 

 reflcxed in fruit, several times shorter than the (4 to G) club-shaped akcues. — Gray, Bot. 

 Calif, i. 335. — Damp woods, California to Erit. Columbia aud east to Lake Superior: 

 fl. summer. Quite distinct from the Chilian, less so from the Amur-IIimalayau species. 



Tribe V. IIELIANTIIOIDE^E, p. 59. 



64. PLtTMMERA, Gray. (Sara Flummer, now Mrs. J. G. Lemmon, the 

 discoverer. She and her husband have shared together the toils, privations, and 

 dangers of arduous explorations in the wilds of Arizona and California, as well 

 as in the delights of very numerous discoveries : so that wherever the name of 

 Lemmon is cited for Arizonian plants, it in fact refers to this pair of most enthu- 

 siastic botanists.) — Proc. Am. Acad. xvii. 215. — Single species. 



P. floribunda, Gray, 1. c. Erect and rather stout herb, apparently from a biennial root, 

 2 or 3 feet high, nearly glabrous, with bitter-ai"omatic odor and savor, fastigiately and corym- 

 bosely much branched above : branches terminating in loose cymes of numerous pedunculate 

 heads: leaves all alternate, 1-3-ternately parted into filiform lobes, impressed-punctate : 

 involucre only 2 lines long : corollas golden-yellow ; those of the ray nearly glabrous, of the 

 disk densely puberulent-glandular. — S. Arizona, in Apache Pass, Mr. & Mrs. Lemmon. — 

 Corollas, involucre, odor, &c., nearly of Aclinclla, sect. Picradenia. 



65. DICRANOCARPUS, Gray. (AtKpavor, a pitchfork, KapTro?, fruit.) — 

 Mem. Am. Acad. v. 322 (PI. Thurb.), & Bot. Mex. Bound. 85. — Single species. 



D. parviflorus, Gray, 1. c. Branching annual, a foot or less high, nearly glabrous : leaves 

 all oi)pot;ite, 1-2-tcrnately divided iiito filiform lobes, or the uppermost nearly simple: heads 

 more or less pedunculate and ])aniculate, terminating slender branches, in flower a line long, 

 yellowish: longest akenes 4 lines and their horns often 3 lines in length. — Iletcrospcrmum 

 dicranocarpum, Gray, PI. Wright, i. 109. — W. Texas, near the Pecos, Wright. (Adj. Mex., 

 Parrij, Palmer.) 



66. GUARDIOLA, Ilumb. & Bonpl. (The name of a Spanish natural- 

 ist.) — Perennial herbs (of Mexico and its northern borders), glabrous, branch- 

 ing ; with merely serrate and commonly pctiolatc veiny leaves ; the branches 

 terminated by the cymulose-clustered heads of w^hite flowers. — PI. JEquin. i. 144, 

 t. 41 ; Gray, PI. Wright, i. 110; Benth. & Hook. Gen. ii. 347. Tulocarpus., 

 Hook. & Arn. Bot. Beech. 298, t. G3. 



G. platyph^^lla, Gray. Somewhat glaucous, 2 or 3 feet high, corymboscly branched : 

 leaves rouudish-ovate, very obtuse, rigidly denticulate or dentate, commonly subcordate (the 



