Oxylheca. rOLYGONACE.K. 32 



])otioles about as Ion-,': involucres narrow ami often somewhat contracted above, 

 al)out 1^ lines long: llowers light rose-color or sonietin}es yellowish, a lino long or 

 more. — J3enth. 1. c. 17 ; Torr. & Gray, 1. c. 



From Washington Territory to San Diego County and N. W. Nevada; fre.iuent and variable. 



50. E. Baileyi, Watson. Very diiFusely much-branched, a foot high or less, 

 glaucous and glabrous (rarely somewhat tomentose tliroughout) excepting the leaves, 

 which are densely white-tomentose both sides, orbicular to broadly ovate, 3 to G 

 lines broad: bracts short, triangular or lanceolate: involucres a line long or usually 

 less, mostly somewhat wider above, with obtuse teeth : (lowers liglit rose-color or 

 yellowish, very small {h to f line long). — Proc. Am. Acad. .\. ;U8. E. gracile, 

 var. efrn/^iim, Torr. (*c ^rray, 1. c. 178, in ])art. 



Var. (?) toinentosum, Watson. Loosely floccose-tonientose throughout: bracts 

 more linear : involucres broadly turbinate and deeply toothed. — Proc. Am. Acad, 

 xii. 208. 



Eastward of tlie Sierra Nevada in the valleys and on the foothills, from Northwestern Nevada 

 to Arizona and San Ikrnardino and Kern Counties, and aeross the boundary in bower Californiii 

 {Palmer) ; the variety in San Hernardino County {Lcmmon) and Tantillas Mountains, Palmer. 



51. B. gracile, Ik-nth. Usually somewhat strict and narrowly panicled, mf)re 

 or less lloccose-tomentoso throughout, a foot high : leaves oblanceolate, or some- 

 times oblong, an inch long or less, attenuate to a slender petiole, tomentose both 

 sides or less so above: bracts more or less elongated or somewhat foliaceous, the 

 lower often including one or more leaves : involucres .scarcely a line long, Ijroader 

 above, with rigid acute teeth, often dark brown : flowers rose-colored or yellowish, 

 I line long. — P.ot. 8uli)h. 40, (\: DC Prodr. xiv. 17 ; Torr. & Gray, 1. c. "l78. 



Southern Califoinia in the Coast Ranges, from Monterey or perliaps San Francisco to San 

 Piego. Variable in habit and pubescence ; sometimes spreading and iliffuse, with glabrate invo- 

 lucres and larger llowers (var. efiixiim, Torr. & (iray, 1. c), or densely white-woolly and witii 

 strict narrow panicle, either with naked stem and light-colored llowers (var. Ic'ucocladon, Torr. & 

 Gray ; E. hnrocladon, iJenth.), or the stem leafy and flowers reddish (var. acdoscUoides, Torr. & 

 Gray ; E. acctoxelloidcx, Torr.). 



E. POLVci.ADON, Henth., of Arizona and New Mexico, is a similar stout white-woolly species, 

 the stem leafy its whole length, and the panicle erect and elongated : leaves oblong-oblanceolate, 

 an inch long or less : bracteoles much more villous than in the preceding species. 



52. E. Plumatella, Dur. d- Ililg. Slender, 3 to 8 inches high, diffusely and 

 intricately much-branched from the base, grayish tomentose throughout, the whole 

 ])lant often reddi.sh : leaves orbicular, 2 to lines broad, on slender petioles : invo- 

 lucres very short, half a line long or le.ss, scarcely exceeding the short bi-acts : 

 llowers yellow, rose-colored, or white, | to at length U lines long, the segments 

 sliglitly unequal, broadly obovate-cuneiform and retuse. — Pacif. P. Rep. v. 14, 

 t. IG ; Torr. & Gray, 1. c. 179. 



Frequent in the dry valleys of Northwestern Nevada ; on Pose Creek, Hecrmann. 



E. iNTRltATUM, Beiith. Hot. Sulph. 46, t. 22, is the only other species of this group, from San 

 Rartolome, Lower California. The diffuse panicle is glabrous or glabrate, with numerous short 

 divaricate branchlets ; involucres very small and glabrous ; llowers also minute, sparingly hairy : 

 leaves rounded, on long petioles, viscid-pubescent. 



6. OXYTHECA, Nutt. 



Involucres few-Uowered, more or less pedicellate, campanulate or turbinate, herba- 

 ceous and not reticulated, 3-5-cleft, the erect or spreading lobes mostly terminated 

 by straight slender awns. Flowers (6-parted), bracteoles, etc., as in Eriogonum. 

 Akene ovate-lenticular (where known); the elongated radicle accumbent upon the 

 rounded cotyledons. — Slender diffusely branched (repeatedly dichotomous) annu- 

 als, the .slender internodes more or le.ss covered with small stipitate glands : leaves 



