3. 
I 
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Chorizanthe.—Involucre 1-3-flowered, 
tubular. Styles 38. Fruit an akene. 
DECANDRIA. 
Monogynia. 
A. Corolla 4-5 petalous, or petals 0. Never 
1. 
gamopetalous. 
Pyrola.—Calyx 5-parted, persistent. 
Hypogynous disc 0. Anthers dehiscent 
by 2 pores. Seeds minute. 
Cercis.—Calyx scarcely dentate. Corolla 
papilionaceous. Anthers versatile. Pet- 
als unguiculate, carina 2-petalous, larger 
than the upper petals. Legume flat o- 
seeded. Ventral suture winged. Shrub. 
Tree. 
Thermopsis.—Calyx cleft to the middle. 
Corolla papilionaceous. Petals of the 
carina partly connate, longer than vexil- 
lum. Legume linear, compressed. 
Pickeringia.—Calyx repandly 4-dentate. 
Corolla papilionaceous. Carina 2-peta- 
lous, as longas vexillum. Legume linear, 
compressed. Shrub. 
Geranium.—Carpidia 5,  verticillate 
around a columnar axis. Styles connate 
at the apex. Stamens all fertile. 
Erodium. — Carpidia 5,  verticillate 
