398 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Lake Washington, St/Jtsdor/" 971; Seattle, SinifA 100; Piper 1049, 

 July, 1895. 



This was included in Suksdorf's list as L. album 11. B. K. The species has long been 

 established and appears native. 



AMMANNIA. 



1. Azamanma coccinea Rottb. PI. Hort. llavn. Descr. 7. 1773. 

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

 Type locauty: Not ascertained. 



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

 Specimens examined: West Klickitat Count}, 5i/i"s</o// 1720. 



ROTALA. 



1. Botala ramosior (L.) Koehne; Mart. Fl. Bras. 13^: 194. 1874. 



Ammannia ramonior L. Sp. PI. 1: 120. 1753. 



Ammannia humilis Michx. F^l. 1 : 99. 1803. 



Type uk-auty: Virginia. 



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



Speclmens examined: Lake Chelan, /xiA-^^tf //m//, August, 1892; Spokane County, Su^s- 

 dorfdOS; Spokane, Pi>er 2644; Almota, Piper, Septemlx>r, 1897. 



Zonal distribution: Arid Transition and Upper Sonoran. 



ONAGRACEAE. P^vening Primrose Family. 



Parts of the flower in twos; fruit indehiscont ■ Circaka (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 Epilobium (p. 399). 



Seeds naked, not comose; leaves all alternate. 

 Anthers versatile. 



Stamens of equal length. 



Stigmas deeply 4-cleft, the loljes 

 linear. 



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

 Ovules in 2 rows; flowers pink. Anooka (p. 407). 

 Stigmas entire or nearly so. 



Calyx-tube longer than the 



ovary, flowers large Taraxia (p. 405). 



Caiyx-tulje shorter than the 



ovary; flowers small Sphaerostigma (p. 405). 



Stamens of unequal length, the outer 

 ones longest. 

 Annuals, small-flowered; caule.scent. Gayophytum (p. 407). 

 Biennials; large-flowered, acaulos- 

 cent. 

 Capsule 4-angled ; seeds grooved 



on one side Pachylophus (p. 408). 



Capsule 4-winged; seeds not 



grooved Lavauxia (p. 409). 



