STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 
Bractlets deciduous or very small 
and inconspicuous; plants very 
sparingly if at all glandular. 
Fruit with 3 or 4 broad, thick, 
wing-like ridges, the body 
strongly rugulose; leaves thick, 
paler below ; flowers 1 mm. long, 
with two or three stamens_-_-__-. 
Fruit with 5 lower, thick, wing- 
like ridges; leaves mostly 
thinner. 
Leaves lanceolate. 
Flowers 2 or 8 mm. long, soli- 
tary or 2 or 3 in a fascicle; 
leaves brown-dotted ; wings 
of fruit much larger than 
in members of the B. erecta 
group ___----- ~~. 
Flowers about 1.5 mm. long, 
sessile, collected in small 
heads; leaves black-dotted ; 
wings of the fruit compar- 
atively thin____-------__- 
Leaves mostly ovate or ellip- 
tical, not lanceolate. 
Leaves black-dotted beneath, 
irregularly ovate, acutish, 
thin; fruit mostly in com- 
pound umbels, conspicuous- 
ly pediceled__----____--~-- 
Leaves not black-dotted be- 
neath. 
Plant tall, erect; leaves 
ovate, acute, Wwavy-mar- 
gined; flowers in com- 
pound umbels____----__- 
Plant low, spreading or 
ascending; leaves mostly 
elliptical, obtuse, “not 
wavy-margined; flowers 
in heads, or in simple 
but not in compound 
umbels___--_----------- 
Fruit glandular-viseid; perennials. 
Fruit scarcely suleate; clusters at 
the ends of the peduncles few- 
flowered; stems almost or quite 
glabrous; Isaves thin, obtuse, 
usually paler beneath____-----~- 
Fruit more prominently sulcate; 
clusters at the ends of the pe- 
duncles many-flowered. 
66788—vol 12, pt S—O9 6 
4. 
D. 
B. triquetra. 
B. maculata, 
377 
6. B, universita tis. 
7. 
10. 
B. erecta, 
. B. erecta 
thornberi. 
. B.intermedia, 
B, paniculata, 
