Hanizonia. 



COMPOSITyE. 



beak ; (hsk-nkenes obscurely hairy, tlioir pappus of 4 or 5 lanroolate firra-chaffv 

 sea cs tapering into stout rougli awns, au<l cf as many intern.o.Iiate short trunoato 

 and lacerate scales. — Proc. Am. Acad. ix. 191. Osmadenia (cnella, Nutt. Calvca- 

 dema tenella, lorr. & Gray. 



+■ -H DMwped or saucer-shaped short-stalked r,land terminatinrj the fascicled leaves 

 and (tracts: ray-alnm not apknlate at either e.ml, the terminal areola depressed 

 tlie surface smooth and even : Jlowers apparently white. 



13. H. Fremontii, Gray. A span high, with ascending ])ranches, slightly hir- 

 sute or hispid : leaves narrowly linear, roughish : heads several-bracted, terminal 

 ami axillary, sliort-peduncled ..r nearly sessiln, campanulato : rays 5 to 7, 3-nartod 

 th<,ir tube very short; disk-llowers about 20: chair of the recoptaclo fonning a 

 12- l.t-toothed cup: pappus of disk-akenes 10 chally scales, at least the alternate 

 ones longer ami subulate-awned, not longer than the ^k^n^.-Calycadeuia Fremontii, 

 Gray, Hot. Mex. liound. 100. 



California, Fremont. The particular station unknown. 



U. H. pauciflora, Gray. About a foot high, with liliform diverging often 

 zigzag branches, minutely scabrous, sparingly hispid, especially along the inar-ins 

 ot the lower portion of the linear-filiform leaves : heads distant and sessile in "the 

 axils along the branches as well as terpinal, cylindrical: ray solitary, 3-parted down 

 to its short tube; disk-flowers 3 combined into a 3-toothed tubular cup, their pappus 

 ot 5 subulato-awned and 5 small intorniediato truncate chaffy scales. — Cah/cadenia 

 paucijiora, Gray, 1. c. ^ 



sin^cfbeen mefwijr'' *''" '*'*'''" ""known. Both species were collected in 184G, and have not 



* * Virrjate; the, stem, or branches strict: heads mostly in. the axih, either solitary or 

 clustered : rays deeply 7,-lohed or sometimes ?,parted ; their akenes with truncate 

 summit slightly if at all apiculate : disk-corollas narroia and long, 5-toothed ■ 

 Jlowers m some and perhaps all the species open only through evening and 

 morning. '^ j y 



-!- Soft-pnhescent, not at all hispid: heads somewhat paniculate or in short-ped uncled 

 axillary clusters. 



.Ji.^i"""!"^' ^'"'T "V"'"* ^ ^""'^ ^''-^^' ^"'^'^'^ ^^-'th a soft fine pubescence, 

 not even hirsute except on the margins of the uppermost leaves and bmcts : these 

 tipped with a tack-shaped or saucer-shaped and short-stalked gland, or sparsely 

 be.set with similar glands : flowers white ; rays 3 to D, almost equally 3-parte<l and 

 with short but slemler tube; disk-flowers 5 to 10 : chaff of the receptacle united 

 into a 6-8-toothed cup: ray-akeiies somewhat rugo.se, and the broad terminal 

 areola rather protuberant : pappus in the disk of 5 or f, subulate-awned scales nearly 

 twice the length of the akenes, and of one or two a.hlitional short and blunt scales. 

 — H. angustifolm, D.iran.l, PI. Horm., Pacif. R. Pep. iii. 10, not of DC. Caly- 

 cadenia mollis, Gray, Proc. Am. Acad. vii. 3G0. 

 ^^Foot-l.ills, Mariposa and Fresno Counties ; very common at White and Hatch's. Bolaudfr, 



-k-+- Glabrous and smooth, or some of the hirer leaves .•^lightly and sparsely hispid : 

 heads scattered, solitary in the arils and terminal. 

 10. H. truncata, Gray. Slender, a foot or two high ; fhe virgatc stem some- 

 times paniculately branched above: leaves very narrowly linear, the short upjier- 

 most and the bracts tipped with a very largo and aliiiost sessile saucer-shaped 

 gland : flowers yellow ; rays 5 to 8, 3-cleft. with verv short tube ; disk-flowers 10 



