Leptosyne. COMPOSITE. 355 



longer erect scales. Eeceptacle flat ; its chaff thin 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 corolla. Glabrous annuals, all Californian ; with alternate leaves 

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

 flowers, terminating long naked peduncles. Gray, Proc. Am. Acad. viii. 659. 

 Agarista, DC. ; Torr. & Gray, Fl. ii. 337, not of Don. Pugiopappus, Gray in 

 Pacif. R. Kep. iv. 48, & Proc. Am. Acad. vi. 545. 



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



COREOPSIS ATKINSONIAXA, Dougl., the only species known to occur west of the Rocky Moun- 

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

 in all gardens, belongs to Oregon, and may be expected in the bordering part of California, 



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 

 from half an inch to an inch long, and from 4 to 10 lines wide. 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 the outer involucre linear : rays rather narrow : akeues 

 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 ring. Ray akenes 

 nearly as in 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, roughish, and with thickish wing-like 

 margins ; those of the disk slightly ciliate. 



Dry plains, on Mohave Creek (Bigcloiv) and Fort Tejon, Dr. Horn. The plant from San Buena- 

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

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

 tube of disk-corollas distinct but beardless. Akenes of the disk inclined to be sterile ; but this is 

 also the case in the first 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. Rays oblong or obovate, 3-toothed or lobed at the end, 10-nerved. Disk- 



