HEMizoNiA COMPOSITjE 349 



CALYCAUBNIA 



glandulai'bearded. Bracts of the involucre in a single series, ob- 

 long or lanceolate, concave or convolute and partly enclosing the 

 rayachenes. Receptacle flat, chaffy throughout, the scales of the 

 outer series united Style-appendages of the disk -flowers linear 

 or subulate, acuta, very hispid. Achenes glabrous: those of the 

 ray obovoid, gibbous or slightly obcompressed, convex on the 

 back, slightly stipitate, the apex ntiostly oblique and terminated 

 with a small often papillose exserted or beaked areola ; of the disk 

 sterile or abortive, oblong, 5-7nerved. Pappus none. 



H. laznlwfolia DC. 1. c, Tomentose-canescent: steins erect, 6-18 

 inches high, corymbosely branched above, the branches and involucre hir- 

 Euie and somfwhat viscid: leaves linear-lanceolate, silky-villous, not glan- 

 dular, 1-5 inches long by 2-4 lines broad, the lower elongated, tapering to 

 the base, denticulate. 3-5-nerved, sometimes opposite : heads numerous, 3-4 

 lines broad, niany-flnwered : involucre hemispherical, its bracts rather 

 shorter than the disk, with short and broadish herbaceous tips: rays 5-10, 

 rather large, white to pinkish : scales of the receptacle united into a cup. 

 Open grounds and fields, southern Oregon and California. 



H. Clevelandi Greene Bull. Torr. Club ix, 1(19. Stems stoutish, 10-20 

 inches high, branching from near the base, villous with long spreading 

 hairs, glandular above: leaves narrowly linear. 1-nerved, silky beneath : 

 heads racemosely or spicately disposed along the slender branches: rays 

 white. In fields and open places, southern Oregon and California. 



53 CALYCADENIA DC. Prodr. v, 695. 

 Slender annuals with rigid chiefly alternate narrowly linear or 

 subulate l^nerved leaves with revolute margins, the upper ones 

 usually terminated by a large saucer-shaped gland. Heads 

 many-flowered; the ray-flowers 3-5, pistillate, 3- lobed or 3-parted, 

 with slender tube : disk-flowers tubular, perfect but mostly infer- 

 tile. Involucre leafy-bracteate at base, its Isracts in a single series, 

 concave, partly enclosing the ray-achenes. Receptacle small, flat, 

 with a single series of distinct or united chafl between the ray- 

 and disk-flowers. " Disk -flowers funnelform, 5-toothed, their style- 

 branches with long filiform hirsute appendages. Achenes some- 

 what hairy ; those of the ray obo void-triangular, without pappus: 

 of tha disk quadrangular, tapering to the base, infertile, with, a 

 pappus of 5-10 chaffy and mostly awned scales. 



C. trnucata DC. 1. c. Hemizonia truncat'i Gray. Very smooth and 

 glabrous: stem 1-2 feet high, simpla or sparingly branched above: leaves 

 linear, 1-3 inches long, the lower ones opposite: heads campanulate, 4 or 5 

 lines high : bracts of the involucre ovate-oblong, boat shaped: ray-flowers 

 5-8, 3-lobed, the middle lobe smallest; <haff of the receptacle 7-9, lightly 

 united at the top into a truncate cup, at length separable : disk-flowers 10- 

 20, with a pappus of 7-10 oblong and somewhat erose- fimbriate pointless 

 palese much shorter than the achenes, sometimes obsolete. On dry plains, 

 southern Oregon to California. 



r. multiglandnlosa DO. 1. c. Stem simple or diffusely much branched, 

 1-2 feet high, strigose-hirsute : leaves mostly scattered, linear, mostly with 

 revolute margins, hirsutely ciliate, sessile: heads numerous, terminal 

 on short lateral branchfets, campanulate, 4 lines high : bracts of th6 Invo- 

 lucre linear /bristly-ciliate, with numerous tack-shaped glands on their 



