460 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Stigmas discoid; plants perennial, 



Wendy at the base. 

 Hypanthium tube longer than 

 the ovary; stigma en- 

 tire 8. Gai.pinsia (p. 465). 



Hypanthium tube shorter 

 than the ovary; stigma 



4-lobed 9. Meriolix (p. 466). 



Stigmas divided into A linear lobes. 

 Stamens equal; capsules without 

 appendages. 

 Petals white at first, some- 

 times pink-tinged later; 

 seeds in 1 row; buds 



drooping 10. Anogra (p. 467). 



Petals yellow; seeds in 2 or 

 more rows; buds usually 

 erect. 



Seeds prismatic-angled 11. Oenothera (p. 469). 



Seeds not angled 12. Raimannia (p. 470). 



Stamens unequal, the alternate 

 ones longer ; capsules winged 

 or angled . 

 Ovules and seeds numerous, 

 clustered on slender funi- 

 culi; plants with branch- 

 ing stems 13. Hartmannia (p. 470 L 



Ovules and seeds few, sessile 

 in 1 or 2 rows; plants 

 acaulescent, or caules- 

 cent. 

 Plants caulescent, with 



long wiry stems 16. Gaurella (p. 473). 



Plants acaulescent or nearly 



so, with thick stems. 



Capsules distinctly 



double-crested on 



the angles; petals 



white 14. Pachylophus (p. 471). 



Capsules winged or sharp- 

 ly angled ; petals yel- 

 low or white 1 5. La vauxia (p. 472). 



1. CIRCAEA L. Enchanter's nightshade. 



Low weak glabrous herb with opposite petiolate loaves and small while reddish- 

 tinged flowers in racemes; hypanthium slightly prolonged beyond the ovary; sepals, 

 petals, and stamens 2; fruit 1 or 2-seeded, indehiscent. 



1. Circaea alpina L. Sp. PI. 9. 1753. 

 Type locality: "Habitat ad radices montium in frigidis Europae." 

 Range: British America and Washington to New Mexico and Georgia. 

 New Mexico: West Fork of the Gila (Metcalfe 516). Damp woods, in the Canadian 



Zone. 



