40 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



C'alyx lobes or sepals more than 3; fruit not sharply angled. 

 Fruit l-seeded, indehiscent; flowers small, green, with no corolla. Sepals 

 5, distinct, or united at the base; plants usually finely wliite-mealy. 



CHENOPOCIACEAE (p. 147). 

 Fruit with more than 1 seed, usually dehiscent; petals nearly always 

 present. 

 Sepals and petals each 4, the sepals distinct; flowers never blue; mostly 



in racemes BRASSICACEAE (p. 163). 



Sepals and petals each 5; flowers sometimes blue. 

 Calyx of united sepals; flowers regular. Fruit a capsule, or of 5 or 

 more carpels arranged in a ring; stipules present. 



MALVACEAE (p. 202). 

 Calyx of distinct sepals; flowers often very irregular. 



Leaves with stipules; fruit an obtuse capsule. Petals bluish. 



Viola (p. 206). 

 Leaves without stipules; fruit of numerous achenes, of several 

 follicles, or a head of hemes. . .RANTJNCTJLACEAE Cp. 156). 

 Leaves not lobed, merely toothed. 



Corolla of united petals, colore^- Fruit a capsule or a berry. 

 Calyx borne on the top of the ovary or fruit; corolla blue or red. 



Corolla split down one side, irregular; stamens united by their anthers. 



LOBELIACEAE (p. 263). 



Corolla not split on one side, regular; stamens free. 



CAMPANTJLACEAE (p. 262). 



Calyx borne at the base of the ovary or fruit and free from it; corolla usually 

 yellow or wMte, never red. 

 Flowers in spikes or racemes; fruit a smooth capsule.. Verbascum (p. 249). 

 Flowers axillary or in cymes; fruit a berry or a spiny capsule. 



SOLAN ACEAE (p. 247). 



Corolla of distinct petals, or none. 



Petals none, the calyx small, green; fruit l-seeded or a 3 or 5-lobed capsule. 

 Plants not hairy, or sometimes with glandular hairs; flowers mostly in 

 terminal panicles, cymes, or panicled spikes; stipules none. Fruit 

 l-seeded or of 5 or 6 carpels. 

 Fruit l-seeded, indehiscent; plants usually glandular-hairy or white- 

 mealy; flowers never in 1-sided cymose spikes. 



CHENOPODIACEAE (p. 147). 



Fruit many-seeded, dehiscent; plants glabrous; flowers in 1-sided spikes. 



PENTHORACEAE (p. 171). 

 Plants hairy, but the hairs never glandular; flowers in axillary clusters or 

 spikes; stipules present. 

 Flowers in spfkes; plants without stinging hairs; fi'iiit a 3-lobed capsule. 



Acalypha (p. 195). 



Flowers in cymes; plants with stinging hairs; fruit an achene. 



TJrtica strum (p. 142). 



Petals present; fruit not l-seeded, but sometimes of numerous achenes. 

 Calyx borne on the top of the fruit or ovary and united with it. Petals 



mostly yellow ONAGRACEAE (p. 212). 



Calyx borne at the base of the ovary or fruit and free from it. 

 Corolla very irregular, one of the petals spurred. 



Stipules present; leaves about as broad as long and usuallj^ cordate 

 at the base, or, if much longer than broad, very hairy; petals white, 



yellow, greenish, or blue. !^ VIOLACEAE (p. 206). 



Stipules none; leaves much longer than broad, narrowed at the base, 

 abrous; petals yellow or orange... IMPATIENT ACEAE (p. 201). 



