Hemizonia. COMPOSITE. .,r,., 



beak ; disk-akenes obscurely hairy, their pappus of 4 or 5 lanceolate firm-chaffy 

 scales tapering into stout rough awns, and of as many intermediate short truncate 

 and lacerate scales. — Proc. Am. Acad. ix. 191. Osmadenia tenella, Nutt. Calyca- 

 cl a in tenella, Torr. & Gray. 



Southern [art of the State, especially around Sau Diego. Heads 3 or 4 lines long. Some of 

 tin- disk-akenes are perfectly fertile. 



-r- +- Disk-shaped or saucer-shaped short-stalked gland terminating the fascicled leaves 

 and bracts: ray-akenes not apiculati at either end, t/ie terminal areola depressed, 

 the surface smooth and even : ftoivers apparently ivhite. 



13. H. Fremontii, Gray. A span high, with ascending branches, slightly hir- 

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

 and axillary, short-peduncled or nearly sessile, campanulate : rays ii to 7, 3-parted, 

 their tube very short; disk-flowers about 20: chaff of the receptacle forming a 

 12— 14-toothed cup: pappus of disk-akenes 10 chaffy scales, at least the alternate 

 ones lunger and subulate-awned, not longer than the akene. — Calycadenia Fremontii, 

 I tray, Bot. Mex. Bound, loo. 



California, Fremont. The pai-ticular station unknown. 



14. H. paiiciflora, Cray. About a foot high, with Hliform diverging often 

 zigzag branches, minutely scabrous, sparingly hispid, especially along the margins 

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

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

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

 of 5 subulate-awned and 5 small intermediate truncate chaffy scales. — Calycadenia 

 pauciftora, ( Iray, 1. c. 



California, Fit mont : the station unknown. Both species were collected in 1S46, and have not 

 since been met with. 



* * Virgate; the stem or branches strict: heads mostly in the axils, i ither solitary or 

 clustered: rays deeply S-lobed or sometimes 3-parted ; their akenes with truncatt 

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

 flowers in some and perhaps all the species open only through evening an I 

 morning. 



-«- Soft-pubescent, not at all hispid : Inn, Is sonu ml/at paniculate or in short-peduncled 



axillary clusters. 



15. H. mollis, Gray. About 2 feet high, grayish with a soft fine pubescence, 

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

 lipped with a tack-shaped or saucer-shaped and shortrstalked gland, or spai 

 lieset with similar glands: flowers white; rays 3 to 5, alraosl equally 3-parted and 

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

 into a 6-8-toothed cup: ray-akenes somewhat rugose, and the broad terminal 

 areola rather protuberanl : pappus in the disk of 5 or 6 subulate av aed scales nearly 

 twiee the length of the ; iknir S and ol' one or two additional short and blunt scales. 



-//. angustifolia, Durand, PI. llerm., Pacif. II. Rep. iii. 10, not of DC. Caly- 

 cadenia mollis, Cray, Proc. Am. Acad, vii. 360. 



Foot-hills, Mariposa and 1'ivsn.. Counties; verv common al White and Hatch's, Bola 



'■ ■ 



+- +- Glabrous and smootlt, or sonu of the lower leaves slightly and sparsely hispid: 

 heads scattered, solitary in tin axils and terminal 



16. H. truncata, < !ray. slender, a fool or two high; the virgate stem some- 

 times paniculately branchod above: leaves very narrowly linear, the short upper- 

 mo-,! and the bracts tipped with a very large and almost sessile saucer-shaped 

 gland: flowers yellow; rays ."> to 8, 3-cleft, with very short tube ; disk flowers 10 



