Guardioht. COMPOSIT-E. 237 



m:\iiy, long and slenJpr : akenes 4--i>le(], glabrcn?. — Fl. Dan. t. 72S: Lam. HI. t. C?0; 

 Sil.th. Fl. Gra;c. t. ^73. — Road.-ides and paitiires, escaped from gardens, and well L-ftaljllihed 

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



63. ADENOCAtTLOX. Hook. ('Ar],;,.. a dand. and KavXor. stem.) — 

 Perennial herbs ; with alternate and dilated leaver on long and margined petiol^-s. 

 slender stems naked and pauiculately branched above, and bearinn very small 

 heads of -n-hiti.sh flower^ : the peduncles, &c.. beset with stalked glands (whence 

 the name) like tlm^e of the akenes but less stout. Flocco>e wool caducous, 

 e.xcept on the lower face of the leaves. — Hook. Bot. MLsc. i. 110. t. 1.5. &: Fl. i. 

 •3<i8 : Maxim. Fl. Amur. 132 ; Gray. Proi-. Am. Acad. viii. G-iiO. it xvii. 214. 



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

 carsely sinuate-dentate or repand or .-lightly lobed, early glabrate and green above, white 

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

 reflexed in fruit, several times shorter than the (4 to 6) club-shaped akenes. — Gray, Bot. 

 Calif, i. 3-35. — Damp woods, California to Erit. Columbia and east to Lake Superior: 

 fl. summer. Qtiite distinct from the Chilian, less so from the Amur-Himalayan species. 



Tribe Y. HELIAXTHOIDE.E. p. 59. 



64. PLTJMMEIIA, Gray. (Sm-a PJummer. now Mrs. J. G. Lemmon. the 

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

 dan<=fers of arduous exploration^ in the wUds of Arizona and California, a^ well 

 as in the delights of vcrv 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, Geav, 1. c. Erect and rather stout herb, apparently from a, bieimial root, 

 2 or 3 feet hiu'b, nearlv glabrous, ^^ith bitter-aromatic odor and sa\or. fastigiately and crym- 

 boselvmuch branched above: branches terminating in loose evmes of mmierous pedunculate 

 heads; leave- aU alternate, 1-3-temately parteil into filiform lobes. im]iresse'!-;.iiiu.;tate: 

 involucre onlv -2 lines long : corollas golt'.en-yellow ; those of the ray nearly glaliriju-. of the 

 disk denselv puberulent-glandular. — S. Arizona, in Apache Pass, Mr. &. J//s. Ltniu,.. i. — 

 CoroUas. involucre, odor, &c., nearly of Adhulla, sect. P^'.radenla. 



65. DICRANOCARPUS, Gray. (XiK^avov, a pitchfork, Kap-i^. fruit.) — 

 Mem. Am. Acad. v. 322 (PI. Thurb.). & Bot, Mex. Bound. So. — Si:.gle species. 



D. parviflorus, Geat, 1. c. Branching annual, a fo.jt or less high, nearly glabrous : leaves 

 all opposite, 1-2-tematelv divided into filiform lobes, or the uppermost nearly simple : heads 

 more or less pedunculate and paniculate, terminating slender branches i-^ flower a line long, 

 yellowi-li : longest akenes 4 lines and their horns often 3 lines in length. — Z7c^;.■'.^J,erm«»i 

 'd:n„„ocaTpum, Grav, PL "VTright. i. 109. — TT. Texas, near the Pecos, Tr,--;/.f. (Adj. :Mex,, 

 Pon-^, Pa/.ne,:) 



66. G-UARDiOLA. Humb. & Bonpl. (The name of a Sixmish natural- 

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

 in o-; with merely serrate and commonly petiolate veiny leaves; the brandies 



' terminated bv the c}-mrdose-clustered heads of white flowers. — PI. ^x:quin. i. 144, 

 t. 41; Grav! PI. TTright. i. 110: Benth. >i: Hook. Gen. ii. 347. Tuloccrpus, 

 Hook. & Arn. Bot. Beech. 298. t. Go. 



G. platjrphylla, Gkat. Scimewhat glancou-. 2 or 3 feet high, corymbosely branched: 

 leaves rovmdish-ovate, verv obtuse, rigidly denticulate or dentate, commonly subcordate (the 



