242 QERANIACEAE. 



Stamens wjth anthers 10; leaves palmately parted 1. Geranium. 



Stamens with anthers 5; leaves pinnatifid or pinnate, or roundish-cordate .... 2. Erodium. 



1. GERANIUM L. Cbanesbill. 

 Herbs (oura annual) with forking stems, swollen nodes .-nxl stipulate pal- 

 mately parted leaves. Peduncles axillary, umbellately _ to 3 : flowered, or 1- 

 flowered. Rowers regular, 5-merous, the sepals imbricate in the bud. stamens 



lit. sometimes slightly connate at base, all with perfeel anthers, the 5 longer 

 alternate with the petals ami with glands at their base. Styles in fruit nearly 

 glabrous inside. Cotyledons plicate, incumbent on the caulicle. (Greek geranos, 

 a ciane, from the elongated fruit-bearing beak.) 



Flowers light pink 1. G. carolinianum. 



Flowers purple 2. G. dissection. 



1. G. carolinianum L. Carolina Geranium. Hirsute-pubescent and 

 often somewhat glandular; smaller plants erect, the larger ascending or de- 

 cumbent, 7 to 14 in. high; leaves palmately 5 to 7-parted, the cuneate segments 

 more or less incisely dissected or toothed, the ultimate segments rather broad; 

 peduncles commonly shorter than the petioles; flowers about 3 lines long; petals 

 light pink; beak of fruit loosely villous or glandular; carpels hairy, usually 

 black ; seed reticulately ridged or pitted. 



Naturalized plant from the Eastern United States, at one time rather 

 common in the Bay region, now rarely seen. Mar.-Apr. 



2. G. dissectum L. Common Geranium. Differing little from the last, 

 but the primary lobes of the leaves very narrow, with the ultimate divisions 

 mostly Blender, somewhat falcate, and acute; petals rose-purple. 



Naturalized from Europe and becoming very common in the Bay region. 



G. PILOSUM Forst, of Australia and New Zealand, adventive at Alameda 

 and San Francisco, is a similar species but is perennial by a thick rootstock 

 and retrorsely canescent pubescent but not glandular. G. molle L. has gla- 

 brous carpels, conspicuously wrinkled transversely, and unpitted seeds; re- 

 ported as occurring at San Francisco and at Olema. 



2. ERODIUM I/Iier. Storksbill. 

 Annual herbs. Leaves opposite, often unequal, either simple or pinnate, 

 with one interpetiolar stipule on one side and two on the other. In vegetative 

 characters very similar to Geranium; the flower and fruit nearly the same, 

 but the stamens with anthers 5 only, the alternate filaments sterile ami scale- 

 like styles bearded inside. Pedicels after anthesis commonly retrocurved, 

 i < Ireek erodios, a heron.) 



reniform-cordate, lobes (if any) shallow 1. k- macrophyllum. 



Leaves oblong to oblong-ovate, pinnatifid or pinnate. 



Leaves pinnatifid] sepals bristle-tipped 2. E. botrys. 



Leaves pinnate with serrate or merely incised leaflets; petals with naked claw; sepals not 



terminated by bristles J. B. moschatum. 



Leaves pinnate With pinnatifid leaflets; claw of petals ciliate; sepals with 1 or 2 terminal 



bristle-like hairs 4- E. ctcutanum. 



1. E. macrophyllum II. A A. . Venules. sent or subaeauleseent, tomentose, 

 with interspersed spreading glandular hairs; leaves reniform-cordate, eremite 



and often with shallow donate lobes. 1 to 1 ' ._. in. broad; umbels mostly 2 to 



3-flowered, on elongated (4 to ( .» in.) peduncles; petals white. 5 to 8 lines 

 long, little exceeding the broad sepals; filaments conspicuously orbicular-dilated 



at base; beak of trait stout; mature carpels densely silky ha iry, truncate at 

 top, I linos long. 



Sacramento and Ban Joaquin valleys. (Has neither the 



