398 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Lake Washington, »S7/^-«to//971; SeB.tt\e, Smith. 100; Piver 1049, 

 July, 1895. 



This was included in Suksdorf's list as L. album H. B. K. The species has long been 

 established and appears native. 



AMMANNIA. 



1. Ammannia coccinea Rottb. PI. Hort. Havn. Descr. 7. 1773. 

 Ammannia latifolia Torr. & Gr. Fl. 1 : 480. 1840. 

 Type locality: Not ascertained. 



Range: Washington to Indiana and Florida. Central and South America. 

 Specimens examined: West Klickitat County, Suksdorf 1720. 



ROTALA. 



1. Rotala ramosior (L.) Koehne; Mart. Fl. Bras. 13-': 194. 1874. 



Aininannla ramosior Yi. Sp. PI. 1: 120. 1753. 



Ammannia humiUs Michx. Fl. 1: 99. 1803. 



Type locality: Virginia. 



Range: Washington to Massachusetts, southward to Central and South America. 



Specimens examined: Lake Chelan, Lafo' ct ffw?/, August, 1892: Spokane County, SuA's- 

 dorfZOZ; Spokane, Piper- 2644 ; Almota, Piper, September, 1897. 



Zonal distribution: Arid Transition and Upper Sonoran. 



ONAGRACEAE. Evexixc; Pri:mrose Family. 



Farts of the flower in twos; fruit indehiscent. . . Circaea (p. 399). 



Parts of flower in fours. 



Fruit few-seeded, nut-like; leaves alternate Gaura (p. 399). 



Fruit many-seeded. 



Calyx limb divided to the ovary, persistent, petals 



minute or wanting Isnardia (p. 399) . 



Calyx limb deciduous; petals conspicuous. 



Seeds comose; lower leaves mostly opposite Epilobiu.m (p. 399). 



Seeds naked, not comose; leaves all alternate. 

 Anthers versatile. 



Stamens of equal length. 



Stigmas deeply 4-cleft, the lobes 

 linear. 



Ovules in 1 row; flowers yellow. Oenothera (p. 407). 

 Ovules in 2 rows; flowers pmk. Anogra (p. 407). 

 Stigmas entire or nearly so. 



Calyx-tube longer than the 



ovary, flowers large Taraxia (p. 405). 



Calyx-tube shorter than the 



ovar}' ; flowers small Sphaerostigma (p. 405). 



Stamens of unequal length, the outer 

 ones longest. 

 Annuals, small-flowered; caulescent. Gayophytlm (p. 407). 

 Biennials; large-flov.ere(i, acaulcs- 

 cent. 



Capsule 4-angled; seeds grooved 



on one side Paciiylopiius (p. 408). 



Capsule 4-wingcd; seeds not 



grooved Lavauxia (p. 409). 



