csEPis COMPOSITAE 399 



NABALUS 



C. scopulorum Coville 1. c. 563. Scantily tomentose, usually glabrate 

 in age, and bearing toward the base scattered eglandulose bristles : stems 

 rather slender, 10-30 inches high, solitary or rarely 2 from the same cau- 

 dex, bearing 1-5 heads, leaves broiadly lanceolate in outline, 4-6 inches 

 long, pinnately or bipinnately divided into linear-lanceolate lobes, pe- 

 duncles slender, usually thickened iust below the heads: involucre 6-8 

 lines high; its bracts linear-lanceolate and barely acute, or the shorter 

 ones acuminate; achenes 4-6 lines long, fusiform, truncate at the apex, 

 not costate, but sometimes obscurely striate. Dry hillsides, eastern 

 Oregon and Washington to Montana; Utah and Nevada. 



C. rostrata Coville, 1. c. 564. Sparingly hirsute with glandless hairs, 

 and more or less tomentose : stems 4-15 inches high, 1-3 from each caudex, 

 striate-angled, bearing 1-3 heads : leaves oblong to broadly lanceolate in 

 outline, 4-6 inches long, pinnately parted into linear-lanceolate entire or 

 toothed lobes : involucre 6-8 lines high, more or less densely clothed with 

 long glandless white hairs : achenes 4-5 lines long, not costate, the upper 

 part contracted into a distinct beak 1-2 lines long. Rocky hillsides, east- 

 ern Oregon and Wiashington to Brit. Columbia. 



C. barbigera Leiberg, Coville 1. c. 565. Slightly tomentose with a 

 minute somewhat flocculent tomentuni, not at all hirsute : stems several 

 from the crown of a thick perennial root, 1-2 feet high, sparingly leafy 

 and bearing an ample corymbose cyme of rather small heads : leaves broad- 

 ly lanceolate in outline. 4-10 inches long, runcinately toothed or deeply cut 

 into linear-lanceolate lobes : involucre 5-7 lines high, of linear, mostly ob- 

 tuse principal bracts and a few very small ovate or lanceolate acute ones 

 at base, all canescent-tomentose and more or less bristly with setaceous 

 white bristles. Dry ridges and rocky banks, eastern Oregon and Wash- 

 ington. 



107 NABALUS Cass. Diet. Nat. xxxiv, 94. 



Leafy-stemmed perennial herbs with alternate dentate or pin- 

 natifid leaves, and usually numerous small mostly nodcjing heads 

 of white yellowish or purplish flowers. Involucre 5-30-flowered, 

 cylindric, usually narrow, unchanged in age, of 1 or 2 series of 

 equal bracts and a few calyculate o'nes at their base. Receptacle 

 flat, naked. Achenes terete or 4-5-angled, usually striate, some- 

 times striately pluricostate, truncate at summit. Pappus of 

 copious rather rigid capillary bristles. 



N. alatus Hook. Fl. i, 294 t. 102. Prenanthes alata Gray. Glabrous 

 or nearly so : stems 1-2 feet high, the larger plants branching : leaves 

 hastate-deltoid, acute or acuminate, sharply and irregularly dentate, ab- 

 ruptly contracted or some of the upper cuneately decurrent into a winged 

 petiole, or small uppermost narrow and sessile by a tapering base : heads 

 loosely and somewhat corymbosely panicled: involucre campanulate-ob- 

 long, of 8-10 often livid bracts, nearly or quite destitute of scarious mar- 

 gins, imperfectly calyculate by 2 or 3 loose linear accessory ones, 5-15 • 

 flowered : corollas purplish : achenes slender, 3-4 lines long, at least 

 sometimes with tapering summit. On moist cliffs, Alaska to Oregon. 



108 LYGODESMIA Don Edinb. Phil. Journ. vi, 305. 

 Smooth herbs with usually rush-like rigid or tough stems, 

 linear or scale-like leaves and terminal or scattered erect heads 

 of pink or rose-colored flowers. Heads 3-13-flowered. Involucre 

 cylindric, its principal bracts 5-8, linear, scarious-margined, equal, 

 slightly united at the base, with several very short outer ones. 



