414 PHANEROGAMOUS PLANTS. 



1. PlPTOCALYX CIRCUMSCISSUS. (Tab. 12, B.) 



IAthospermum t circumscisswn, Hook. & Am. Bot. Beech, p. 370; DC Prodr 10 

 p. 84. 



Hab. Walla- Walla and Upper Columbia, Washington Territory. — 

 Plant hispid, with grayish hairs, 1 to 3 inches high, branching from 

 the root and spreading. Leaves 4 to 6 lines long, scarcely a line wide. 

 Flowers in short terminal leafy racemes, sessile. Calyx cleft to the 

 middle ; the short tube somewhat 5-angled ; lobes linear-lanceolate, 

 erect, densely clothed with long erect hairs ; the upper portion of the 

 tube opaque and deciduous; the lower somewhat hyaline, obtusely 

 5-toothed, corresponding with 5 notches in the base of the deciduous 

 portion. Corolla a little longer than the calyx. 



Plate 12, B. Piptocalyx circumscissus : an entire plant. Fig. 1. 

 A flower, enlarged. 2. Corolla laid open, showing the insertion of 

 the stamens. 3. Calyx, showing the line of separation, magnified. 

 4. The same, laid open, the upper and lower portions a little separated, 

 and the lower part of the style remaining. 5. Mature fruit, magnified ; 

 as are all the following. 6. The same, with all the nutlets but one 

 removed. 7. Inside view of one of the nutlets. 8. Transverse sec- 

 tion of the same. 9. Seed. 10. Embryo separated from the same. 

 The details more or less magnified. 



8. EPvITRICHIUM, Schrader. 

 1. Eritrichium leucopeueum, Mph DC. 



Eritriehium leucophmtm, Alph. DC. Prodr. 10, p. 129. 



Myosotis leucophcea, Dougl.; Lehrn. in Hook. Fl. Bor.-Am. 2, p. 82, t. 163. 



Hab. On the Wall a- Walla River, Washington Territory. — A rare 

 and well-characterized species, easily distinguished by its acute, 

 shining, perfectly smooth nutlets, which are flat on the back ; one or 

 more of them frequently abortive. 



