POLYGONACEil. 443 



6. Eriogonum polyanthum, Benth. in DC (Tab. 14, B.) 



Hab. Headwaters of the Sacramento, Northern California, where 

 it was found also by Col. Fremont and Dr. Newberry. — Plant woody 

 and decumbent at the base, the branches assurgent, 12 to 18 inches 

 high. Umbel of 4 to 7 simple rays. Perianth yellow, much enlarged 

 after flowering. 



Plate 14, B. Eriogonum polyanthum : the entire plant (except 

 the prostrate stem) of the natural size. Fig. 1. A head of flowers; 

 the involucre laid open longitudinally. 2. The involucre and persis- 

 tent pedicels, after the flowers have fallen. 3. Upper part of the 

 involucre laid open. 4. A separate flower, with its pedicel and brac- 

 teole. 5. One of the inner divisions of the perianth, with three 

 s'tamens inserted near its base. 6. A stamen. 7. Achenium and 

 persistent styles. 8. A seed. 9. The same longitudinally divided. 

 10. Transverse section of the same. 11. Embryo, all the details 

 more or less magnified. 



7. Eriogonum latifolium, Smith, 



Hab. California, in the vicinity of San Francisco; including E. 

 oblongifolium, Benth., as a less robust variety, with leaves inclined to 

 be acute at base. [The var. ? minus, Benth., from Spokane River, 

 Washington Territory is probably of some other species, but the 

 specimen is insufficient for determination.] 



8. Eriogonum affine, Benth. in DC. 



Hab. Umpqua River, Northern Oregon. — Plant 12 to 18 inches 

 high. Primordial leaves much larger than the later ones, acute at 

 the base, the petioles very long ; secondary leaves about an inch long. 

 Peduncle bi-trichotomously divided at the summit. Involucre tubular- 

 campanulate, somewhat truncate, and obtusely 5-toothed. Perianth 

 smooth; the divisions nearly equal. Filaments and ovary smooth. 

 Bracteole plumose. Embryo a little curved. Perhaps too near the 

 following. 



