568 POLYGONACEjE bkiogontim 



6 Bninex Sepals 6, the outer spreading, the inner enlarged and appress- 



ed to the triangular achene: stigmas 3, tufted. 



7 Oxyria Sepals 4, the outer smaller and spreading : stigmas 2, tufted : 



achenes prbicular, winged. 



Tribe 1 Eriogoneas Meisner PI. Vas. Gen. 229, as Order. Herbs 

 or shrubby plants with alternate or verticillate leaves without stipules. 

 Flowers involucrdte, S-6-parted or S-6-lobed. Stamens 9. Styles 

 3, with capitate stigmas. Juice nea rly tasteless. 



1 ERIOGONUM Michx. Fl. 1246. (1803.) 



Annual or perennial acaulescent or leafy- stemmed herbs or shrubs 

 with entire alternate opposite orwhorled leaves and small, perfect 

 flowers on jointed pedicels subtended by an involucre in panicles 

 racemes heads or umbels. Involucre campanulate top-shaped or 

 almost^cylindrical , 5-8- toothed or 5-8 elel't, the teeth pointless. 

 Calyx 5-cleft or 5-parted, usually colored, the segments equal or 

 the outer ones larger. Stamens 9, with filiform filaments and 

 oblong anther. Style 3-parted, stigmas capitate. PruitaS-angled 

 pyramidal achene invested by the calyx-segments, or winged. 



§ 1 Involucre not nerved or angled, 4-8-tot)thed or lobed, more 

 or less broadly turbinate; bracts foliaceous, ihdefinite in number. 



* Perennials, more or less tomentose or rarely glabrous, with pedun- 

 cles naked and scape-like, or verticillate-bracteate in the middle: bracts 

 mostly conspicuous: involucres 5-8-toothed or 5-8-cleft, in a simple or 

 compound umbel or solitary: flowers mostly attenuate to a-stipe-like 

 base: achenes glabrous or nearly so. 



E. flavnm Nutt. Fras. Cat. (1813. ) White-tomentose throughout: stems 

 very short and thick, simple and solitary to tufted and creeping, woody: 

 scapes 2-13 inches high: leaves ^crowded on the short stems, linear-oblong 

 to lanceolate, ,1-3 inches long narrowed into petioles with dilated and imbr- 

 icated base inflorescence regulaily umbellate: involucre top-shaped, 2-2}^ 

 lines Tong:'bracts spatulate, foliaceous: calyx yellow Slineshigh, top-shaped, 

 very villous, the segments obovate: stamens and style-branches exserted 

 achenes constrictedjat the middle, 2 lines long, villous at the summit the 

 angles undulate, the faces swollen, Diy plains eastern Washington to 

 Arizona and Nebraska. 



E. Piperi Greene. " Densely tufted on a stout woody caudex : stems 

 erect, leafless tomentose, 5-10 inches tall: leaves all basal, lanceolate or 

 oblanceolate, acute or obtuse, densely hairy beneath, green and less hairy 

 above, 1-2 inches long, attenuate into a usually shorter petiole: umbels 

 several-rayed, simple, or contracted into a dense cluster: bracts 3-8, oblan- 

 ceolate, l-li4 inches long: involucre short- toothed, villous: flowers yellow , 

 2-3 lines long. Summit of Cedar Mountain, Washington. Hardly distinct 

 from E. flavumlNutt.^" Piper & Kent in Palouse Flora, 50. 



E.J androsacenm Benth. Dwarf /jperennial: tomentose throughout^ or 

 smoother above: caudex branching: leaves oblanceolate or spatulate, white- 

 woolly beneath, glabrate above: scapes,2-3jinches high, simple: umbel simple 

 or subcapitate, 4-7- rayed: rays short andj slender: teeth of the involucre 

 short, erect or nearly 8o:flowers spai-ingly villous, yellow, 2-3 lines long, short 

 attenuate. On the highmountains of eastern Wjishington to Brit. Columbia . 



