1287.) 



BUCKWHEAT FAMILY. 

 Eriogonum longifolium Nutt. Long-leaved Eriogonum. 



ogoinim longifolium Xutt. Trans. Am. Phil. 

 Soc. (II.) 5: 164. 1833-37. 

 E. Texanum Scheele, Linnaea, 23: 150. 1849. 



Perennial, strigose throughout, stem stout, 

 erect, paniculately or corymbosely branched, 

 leafy, finely grooved, 2-4 tall. Leaves n.n- 

 rowly oblong or linear-oblong, obtuse at the 

 apex, more or less tomentose beneath, the upper 

 sessile, the lower narrowed into petioles with 

 dilated and sheathing bases; bracts lanceolate 

 or subulate; involucres turbinate-campanulate, 



z // -2 // long; peduncles i' long or less; calyx 

 oblong-campanulate, 2"--$" high, 6-parted to 

 near the base, very villous; stamens and style- 

 branches exserted; achene 2 l / 2 f ' long, much en- 

 irged at the base, villous, loosely invested by 

 the calyx-segments, not winged. 



Southern Missouri to Texas. Also in Florida. 

 June-Nov. 



3. Eriogonum Alleni S. Wats. Allen's 

 Eriogonum. (Fig. 1288.) 



E. Alleni S. Wats, in A. Gray. Man K<1... 7.^4. 1890. 



Perennial, floccose-tomentose throughout, 

 stem rather stout, erect, sparingly branched 

 above, i-i^ tall. Leaves oblong, or ovate- 

 oblong, i '-3' long, the basal long-petioK 

 tuse at both ends, those of the stem in wh 

 3-5 at the somewhat swollen nodes, short-peti- 

 oled, narrowed at the base, the upper small and 

 bract-like; inflorescence compoundly cymosc; 

 involucres t'-p-shaped, 5-toothed, 2j-j"-3" long, 

 the teeth obtusish; bracts leaf -like, spatulate; 

 calyx yellow, ift" long, broadly campanu- 

 late, its segments obovate or orbicular; stamens 

 and style-branches exserted. 



White Sulphur Springs. \Vc*t Virginia. July-Aug. 



4. Eriogonum Jamesii Benth. James' Eriogonum. (Fig. 1289.) 



. in DC. Prodr. 14:7. 1856. 



Eriogonum sericeum Torr. ; T. & G. Proc. Am. 

 Acad. 8: 155. 1870. Not Pursh, 1814. 



Perennial, base woody, scaly, somewhat 

 branched, stem usually spreading, branched, to- 

 mentose, slender, 6 / -i8 / long, the branches erect, 

 3 or 4 times forked, light brown or reddish. 

 Leaves mostly basal, spatulate or oblong, I '-4' 

 long, long-petioled, the upper smaller, sessile in 

 whorls of 3 or 4 at the somewhat swollen nodes, 

 all obtuse or subacute, dark green and sparingly 

 tomentose above, densely gray-tomentose be- 

 neath, their margins sometimes slightly revolute 

 and crisped; inflorescence compoundly cytnose; 

 involucres turbinate-campanulate, 2" long, 5- 

 toothed, the teeth rounded; bracts foliaceous, 

 narrowly oblong or oblong-spatulate; calyx white 

 or pink, campanulate, villous, 2%"-$" long, its 

 segments oblong or obovate; stamens and style- 

 branches exserted ; achene 2^ // ~3 // long.smooth, 

 villous near the apex, its angles margined. 



On plains, Kansas (?), Colorado to Texas, Arizona and Chihuahua. July-Oet. 



35 



