HEMIONZAT COMPOS IT JE 349 



CALYCADSNIA 



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

 long or lanceolate, concave or convolute and partly enclosing the 

 ray-achenes. Receptacle flat, chaffy throughout, the scales of the 

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

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

 ray obovoid, gibbous or slightly obcompressed, convex on the 

 back, slightly stipitate, the apex mostly oblique and terminated 

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

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



H. luzulaefolia BO. 1. c. Tomentose-canescent: stems erect, 6-18 

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

 sute and somewhat viscid : leaves linear-lanceolate, silky-villous, not 

 glandular, 1-5 inches long by 2-4 linea broad, the lower elongated, tapering 

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

 3-4 lines broad, many-flowered: 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. Cleveland! Greene Bull. Torr Club ix, 109. Stems stoutish, 10-20 

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

 hairs, glandular above: leaves norrowly 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 1-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 inter- 

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

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

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

 und 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 the disk quadrangular, tapering to the base, infertile, with a 

 pappus of 5-10 chaffy and mostly awned scales. 



C. trnqcata DC. 1. c. Hemizmiia truncata Gray. Very smooth and 

 glabrous: stems 1-2 feet high, simple or spa ing'y branched adove: leaves 

 linear, 1-3 inches long, the lower ones opposite: heads campanulate; 4 or5 

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

 5-8, 3 lobed, the middle lobe smallest: chaff 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 flmbriate pointless 

 palese much shorter ihan the achene/s metimes obsolete. On dry plains, 

 southern Oregon to California. 



0. niiiltiprluiHliilosu DC. 1. c. Stem simple or diffusely much branch- 

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

 with resolute margins, hirsutely ciliate; sessile: heads numerous, terminal 

 on short lateral branchlets, campanulate, 4 lines high : bracts of the invo- 

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



