352 FLORA. 



1. Eriogonum alatum Torr. WINGED ERIOGONUM. (I. F. f. 1286.) 

 Perennial, strigose. Stems erect, 3-9 dm. tall, paniculately branched ; leaves 

 mostly basal, spatulate to oblanceolate, 2.5-7.5 cm. long, or those on the stem 

 nearly linear, obtuse or rather acute, ciliate, with prominent midrib beneath ; 

 panicle open ; involucres in cymtiles, campanulate, 2-3 mm. high, the 5 teeth 

 obtuse, spreading or retlexed ; calyx yellowish, 2 mm. long; filaments glabrous ; 

 achenes 5-7 mm. long, glabrous, 3 -winged its whole length. On plains and 

 prairies, Neb. to Colo., south to Tex. and N. Mex. June-Sept. 



2. Eriogonum longifolium Nutt. LONG-LEAVED ERIOGONUM. (I. F. f. 

 1287.) Perennial from a stout root, caulescent. Foliage strigose or somewhat 

 tomentose; stems erect, 6-13 dm. tall, paniculately or corymbosely branched above; 

 leaves alternate, the blades narrowly oblong or linear-oblong, 5-22 cm. long, the 

 lower ones with broad sheathing petioles, the upper sessile; bracts lanceolate to 

 subulate ; involucres turbinate-campanulate, 4-5 mm. long, silky ; calyx herba- 

 ceous, 4-5 jnm. long; achenes pubescent especially above, 4-5 mm. long including 

 the beak. In dry soil, S. Mo. to Tex. June-Nov. 



3. Eriogonum Allenii S. Wats. ALLEN'S ERIOGONUM. (I. F. f. 1288.) 

 Perennial, floccose-tomentose; stems erect, 2-6 dm. tall, dichotomously branched 

 above; leaves basal and in whorls of 3*3 to 5's at the nodes, the blades oblong or 

 ovate-oblong, 6-8 cm. long, obtuse at both ends or cordate at the base, rather 

 green above, the basal slender- petioled; involucres in clustered cymes, turbinate, 

 3-6 mm. high, with 5 obtuse teeth; calyx bright yellow, 6-7 mm. long, pubes- 

 cent, the segments spatulate or obovate-spatulate, rounded, concave; stamens and 

 style-branches exserted; achenes. On dry mountain slopes, Va. and W. Va. 

 July-Aug. 



4 Eriogonum Jamesii Benth. JAMES' ERIOGONUM. (I. F. f. 1289.) Per- 

 ennial by woody rootstocks, tomentose with white or whitish hairs; stems short; 

 leaves approximate, the blades oblong to oblong-spatulate, 3-8 cm. long, narrowed 

 into slender petioles which often exceed the blade in length, rarely glabrate above; 

 peduncles erect, or assurgent, sometimes tufted, 1-3 dm. tall, dichotomous and 

 corymbose above; bracts broadened upward or oblong; involucres campanulate, 

 about 5 mm. high, sessile or short-stalked, with rounded teeth ; calyx white or 

 pink, 4 mm. becoming 6-7 mm. long, the tube attenuate into a stipe-like base, the 

 inner segments longer and slightly larger than the outer; filaments villous at the 

 base; achene 4 mm. long, pubescent above the swollen base. On plains and 

 prairies, Kans. and Colo, south to N. Mex. and Ariz. June-Nov. 



5. Eriogonum flavum Nutt. YELLOW ERIOGONUM. (I. F. f. 1299.) Per- 

 ennial from a stout scaly base, scapose, tomentose throughout with white hairs; 

 leaves crowded, linear-oblong to oblong-spatulate, 2.5-8 cm. long, flat or nearly 

 so, narrowed into short petioles with dilated bases; scapes erect, 5-30 cm. long, 

 mostly solitary; involucres in terminal umbels, turbinate 4-5 mm. high, shorter 

 than their stalks, with blunt teeth; bracts subtending the umbel similar to the leaves 

 but smaller ; calyx yellow, about 6 mm. long, copiously pubescent, narrowed into 

 a stipe-like base; filaments villous at the base; achenes about 4 mm. lont*, villous 

 near the top. On dry plains and prairies, N. W. Terr, south to Neb., Kans. and 

 Ariz. Summer. 



6. Eriogonum pauciflorum Pursh. FEW-FLOWERED ERIOGONUM. (I. F./. 

 1294.) Perennial, sparingly pubescent; stems very short, covered with the per- 

 sistent leaf-bases; leaves linear or linear-spatulate, 2.5-7.5 cm. long, glabrous or 

 nearly so above, tomentose or cottony beneath, becoming strongly revolute, slender- 

 petioled; peduncles slender, erect. 5-15 cm. high, simple, sparingly tomentose; 

 involucres 4-10, capitate, about 3 mm. high, turbinate-campanulate, with 5 obtuse 

 teeth ; calyx white, about 3 mm. long, glabrous; achenes 2.5 mm. long, the faces 

 swollen about the middle, inconspicuously striate-reticulated. On dry plains, 

 Neb. and Colo. Summer. 



7. Eriogonum multiceps Nees. BRANCHED ERIOGONUM. (I. F. f. 1293.) 

 Perennial from a more or less matted base, tomentose with white hairs. Leaves 

 spatulate, 1.5-5 cm - l n g> numerous, obtuse; peduncles simple, 2.5-15 cm. long, 

 rather slender; involucres 3-12, in a head terminating the peduncles, about 3 mm. 

 high, with 5-6 acute teeth ; bracts spatulate ; calyx white or rose, 3 mm. becom- 

 ing 5 mm.- high, somewhat vJlous, the begments cuneate, obtuse or notched at the 



