STANDLEY—ALLIONIACEAE OF THE UNITED 
Wings of the fruit thin. 
Flowers about 1 em. long. 
Fruit with broad wings which are pro- 
longed above the body of the fruit and 
are acute ___-_-______------------------ 
Fruit with very narrow wings which are 
widest in the middle and not prolonged 
Flowers 1.5 cm. long or more. 
Leaves thick, broad, and shining; bracts 
thick___---_-----_--_-__-__---------------- 
Leaves thin, not shining, narrow, or if 
broad puberulent; bracts thin. 
Wings truneate above or sloping up to 
the short beak___------------------ 
Wings prolonged above the body of the 
fruit. 
Leaves narrowly — elliptical = or 
lanceolate; wings of fruit much 
narrowed below ~~~ -~~------~ 
Leaves wider and irregular; wings 
little narrowed below __--------- 
Stems typically villous, 
Fruit small, with only 2 wings, which are large, 
considering the size of the body of the fruit: 
plants erect or ascending when young, Jater pros- 
Fruit larger, almost always with more than 2 wings. 
Fruit with the wings little narrowed below and 
broad; body of the fruit small, not ribbed or 
pitted; leaves more or less sinuate-margined. 
Wings rather thin; leaves only slightly 
sinuute; plant stout ---__---~-----_-__- 
Wings thick and tough; leaves conspicu- 
ously sinuate; plant slender _-——~-~~~~- 
Fruit with the wings much narrowed below; 
body of the fruit large and conspicuous, fre- 
quently strongly ribbed or pitted; leaves not 
sinuate. 
Flowers about 12 mim. long -—~------------- 
Flowers about 25 mm. long. 
Wings not much prolonged nbove the 
body of the fruit, the sinus between 
them broad and shallow ___~- ~---——- 
Wings much prolonged above the body 
of the fruit, forming a deep and nar- 
row sinuS___~___-_------------------ 
IV. Nanar. Low perennials, 20 em. high or less, with thick 
woody cuudices; fruit with thin, double wings. the central 
cavities extending to their edges, 
Bracts narrowly lanceolate ___-------------------------- : 
Bracts elliptical or obovate, broader. 
Leaves broadly or narrowly elliptical ...----------- 
Leaves narrowly oblanceolate _——~—~-—---~--------------- 
STATES. 309 
5 
10, 
11. 
18. 
14. 
19. 
A. acutalata, 
A. brevifiora, 
A. neurophylia. 
A. umbellata. 
A. minor. 
A. variabilis. 
A. pogonantha, 
A. platyphylla, 
A. gracilis, 
A. villosa. 
A. pinetorwum., 
A, aurita. 
A. covillet. 
A. nand, 
A. bigelovii. 
