Leptosyne. COMPOSITE. 355 



longer erect scales. Eeceptacle flat; its chaff tliiu and scarious, linear or lanceolate, 

 deciduous with the fruit. Kays mostly broad and truncate, obscurely 3-4-lobed 

 or crenate, many-nerved. Disk-corollas with a short-bearded or beardless ring at 

 the summit of the slender tube ; the dilated limb 5-lobed. Style-branches of°the 

 ray-flowers often short and included ; of the disk-flowers tipped with a very short 

 cone or nearly truncate. Akenes obcompressed, flat, oval or oblong ; those of the 

 ray broader, glabrous or nearly so, more or less wing-margined ; those of the disk 

 wingless, villous or ciliate, coherent at base with the subtending appressed chaff'. 

 Pappus of the ray none, of the disk a pair of long bayonet-shaped chaffy awns, little 

 shorter than the coroUa. — Glabrous annuals, all Cahfornian ; with alternate leaves 

 once or twice pinnately parted into linear lobes, and showy heads of golden-yeUow 

 flowers, terminating long naked peduncles. — Gray, Proc. Am. Acad. vni. G59. 

 Arjarista, DC. ; Torr. & Gray, Fl. ii. 337, not of Don. Pugiojmppus, Gray in 

 Pacif. E. Pep. iv. 48, & Proc. Am. Acad. vi. 545, 



This genus and the next take the place of Coreopsis in California. 



Coreopsis Atkinsoxiana, Dougl., the only species known to occur west of the Rocky Moun- 

 tains — a species which resembles the well-known C. timtoria of the Arkansas region, common 

 in all gardens, — belongs to Oregon, and may be expected in the bordering part of CaUfomia. 



1. P. calliopsideus, Gray. A foot or two high, leafy below : lobes of the leaves 



linear : head large : scales of the outer involucre ovate, united at base : rays obovate- 

 cuneiform : ray-akenes with a thin winged margin ; those of the disk clothed with 

 very long villous hairs on the margins and inner face. — Agarista calliopsidea, DC. 

 Prodr. V. 569. Coreopsis calliopsidea, Bolander, Cat. PI. San Francisco. 



Moist hillsides and plains, from the Bay of San Francisco southward. Variable in size : rays 

 troni halt an inch to an inch long, and from 4 to 10 lines wdde. Disk-corollas with a short- 

 bearded ring on the tube. 



2. p. Breweri, Gray, 1. c. Much smaller than the preceding, with finer divis- 

 ions to the leaves : scales of tlie outer involucre linear : rays nltlier narrow : akenes 

 of the disk long-villous on the margins and the middle of the inner face, otherwise 

 glabrous : chaffy awns of the pappus stouter, only half the length of the akene. 



Dry hills near San Buenaventura, March {Brewer) ; San Bernardino desert. Parry. Rays half 

 or two thirds of an inch long, 2 to 4 lines wide : disk-corollas with a beardless rin^^. Ray akenes 

 nearly as m the next ; those of the disk more like those of the preceding, except in their smaller size. 



3. P. Bigelovii, Gray, 1. c. A span high, leafy only at the base : the small 

 head on a nearly naked scape : leaves almost simply pinnately parted into a few 

 narrowly linear rather fleshy divisions : scales of the outer involucre broadly linear : 

 rays broad: ray-akenes narrowly oblong, roughisli, and with tliickish wing-like 

 margins ; those of the disk slightly ciliate. 



Dry plains, on Mohave Creek {Bigclow) and Fort Tejon, Dr. Ham. The plant from San Buena- 

 ventura inadvertently nfcn ed to this species in Proc. Am. Acad. v. 645, is the preceding, 

 ihe head of this only ImK as large. Rays quadrate-oblong, 4 or 5 lines in length. Ring on the 

 tube of disk-corollas distin, I l.ut beardless. Akenes of the disk inclined to be sterile : but this is 

 also the case in the hrst species. 



52. LEPTOSYNE, DC. 



Head many-flowered, heterogamous ; the rays several or numerous, pistillate ; 

 disk-flowers perfect. Involucre double ; the outer of 5 to 8 narrow and loose folia- 

 ceous scales ; the inner of 8 to 12 erect more membranaceous scales. Receptacle 

 nearly flat ; its chaff thin and scarious, linear or lanceolate, deciduous with the 

 fruit. Pays oblong or obovate, 3-toothed or lobed at the end, 10-nerved. Disk- 



