Eriogonum.1 POLYGONEiE. 



133 



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sensim minoribus bracteiformibus), caule herbaceo erecto dichotomo, ramis e]ongatis 

 spiciformibus. Meisn. Polyg. p, 9\. Ph. Am, L p. 270.— P. filiforme. i?ar/.— P. lini- 

 folium. MuhL — Spreng, , 



Hab. Canada. (PA.) Sandy banks of the Saskatchawan. Drummond. North W. America. Douglas, 



Walla-wallah River, where the small annual root is eaten by the natives! — G inches to a foot high, stiff and 

 wiry. 



15. P. coarciatum (Dougl. mst.) ; annuum dichotomum erectum v. diffusuni, folii's 

 linearibus vel lineari-lanceolatis acutis marginibus revolutis, ochreis basi vaginantibus 

 folio brevioribus, floribus trigynis axillaribus in foliis superioribus coarctatis, achenio 

 ovato-trigono minutissime punctate. — P. lineare. Menz, msL — a, floribus folio brevioribust 



■^. floribus folio longioribus. 



Hab. N. W, America. Menzies. Dr Scolder, On the sandy barrens of the Columbia and its branches, 

 and on the higher branches of the Multnomak. Douglas. — j3. Prairies at Nusqually Bay, N, W. America. 

 Tolmie. — This seems a very distinct species of the " Avicularia" section, and to be wholly confined to 

 the Pacific side of America. Stems from 3 inches to a foot long, slender and wiry. 



§ 7. POLYGONELLA. Nutt, 



16. P, articidatum (Willd.); ei'ectum ramosum rigidum 8-andrum trigynum, foliis 

 parvis linearibus, ochreis truncatis, pedunculis terminalibus racemosis articulatis, bracteis 

 ochreiformibusj floribus nutantibus 5-sepaIis. Ph. A^n. 1. p, 272. 



Hab. Canada. {Ph.) About the Saskatchawan. Dr Richardson. Drttmmond. — A very remarkable 

 species, which Meisner, as well as Michaux, seem to think should form a distinct genus. 



5. ERIOGONUM. Mich, 



Involucrum tubulosum, campanulatum vel cyatliiforme, vix angulatum, suba^qualiter 

 6-dentatum, multiflorum. Receptaculum bracteolis intra pedicellos instructum. Peri- 

 anthia exserta, profunde 6-fida. Benth, in Limu Trans, v. 17. p. 407. 



§ 1, Umbellata. Benth. 



1. E. sphcerocephalum (Dougl. mst.); caule ramoso folioso, foliis fasciculatis verticilla- 

 tisve oblongis basi angulatis subtus albo-lanatis, pedunculis subsimplicibus, involucro sub- 

 solitario late campanulato tomentoso multifloro, perianthiis extus sericeo-pilosis, (Tab. 

 CLXXV.)— iJew^A. /. c. p. 407. 



Hab. Common on the Columbia River, on rocks of the " Stony Islands," and Priest's Rapid. Douglas. 

 — A small shrub, with leafy branches, and capitate umbels of yellow flowers. 



Tab. CLXXV. Eriogonum sph^kocephalum. Fig. 1, Involucre with flowers;/ 2, Single flower ; /. 3, 



Pistil : — magnified. 



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2. E. Jlavum (Nutt. in Eras. Cat); foliis ad basin caulis approxiinatis spathulato- 

 obovatis oblongisve subtus vel utrinque albo-lanatis, pedunculo apice breviter umbellato, 

 involucris ad apices radiorum solitariis late campanulatis lanatis multiflorisj perianthiis 

 sericeo-villosis. Benth. I. c. /?. 408. — E. sericeum. Ph, Am. \.p. 277, 



