GERANIACEAE 403 



Locs. — Murphy Mdws., Bald Mt., ace. Tracy; Prairie Creek, Tracy 7499; Triaity Summit, 

 Manning 37. Ore.: Mt. Hood, Keclc 317. 



Eefs. — OxALis TRiLLiiroLiA Hook, Fl. Bor. Am. 1:118 (1830), type loc. high mts. near the 

 grand rapids of the Columbia Eiver, Douglas; Jepson, Man. 588 (1925). Eesperoxalis trilliifolia 

 SmaU, N.Am. Fl. 25:27 (1907). 



GERANIACEAE. Geranium Family 



Ours herbs with lobed and divided leaves and searious stipules. Flowers com- 

 plete, regular, symmetrical, 5-merous. Sepals persistent. Petals deciduous. Sta- 

 mens as many or twice as many as the petals. Ovary superior, 5-celled, deeply lobed, 

 the 5 styles united around the elongated axis (prolongation of the receptacle) and 

 free only at tip. Fruit of 5 one-seeded carpels separating elastically when ripe 

 from the central persistent axis and bearing the twisted or spirally coiled styles as 

 tails. — Genera 5 and species about 600, temperate and subtropical regions of all 

 continents. 



Bibliog. — Trelease, W., A study of N. Am. Geraniaceae (Mem, Best, Soc. Nat, Hist. 4:71- 

 103, pis. 9-12,-1888). Knuth, R,, Geraniaceae (Engler, Pflzr. 4'^:l-640, figs. 1-80,-1912). 



Stamens with anthers 10 ; leaf -blades palmately parted ; styles in fruit nearly glabrous inside 



1. Geranium. 



Stamens with anthers 5; leaf -blades pinnatifid or pinnate, or roundish-cordate; styles in fruit 



bearded inside 2. Erobium. 



1. GERANIUM L. Cranesbill 



Herbs with forking stems, swollen nodes and stipulate leaves with palmately 

 parted blades. Peduncles axillary, umbellately 2 or 3-flowered, or 1-flowered. 

 Flowers regular, 5-merous, the sepals imbricate in the bud. Stamens 10, some- 

 times slightly connate at base, all with perfect anthers, the 5 longer alternate with 

 the petals and with glands at their base. Styles in fruit nearlj^ glabrous inside. 

 Cotyledons plicate, incumbent on the caulicle. — Species about 250, temperate 

 regions of both hemispheres and mountains of the tropics. (Greek geranos, a 

 crane, from the elongated fruit-bearing beak.) 



Petals 1 to 2% (or 3) lines long, little or not at all exceeding the calyx ; stems leafy. 

 Carpels hairy; stems (especially the lower part) usually retrorsely pubescent. 



Perennial; seeds superficially reticulate; pubescence glandless 1. G. pilosum. 



Annuals. 



Inflorescence usually glandless ; flowers light pink ; leaf-divisions broad ; seeds retic- 

 ulated 2. G. carolinianum. 



Inflorescence more or less glandular; flowers purple; leaf -divisions narrow; seeds 



regularly pitted 3. G. dissectum. 



Carpels glabrous, transversely wrinkled; seeds smooth; stems and petioles pilose-spreading, 



the hairs sometimes glandular; annual 4. G. molle. 



Petals 4% to 10 lines long, much exceeding the calyx; carpels and beaks glandular-pubescent; 

 seeds very minutely roughened ; perennials. 



Leaves all basal; San Bernardino Mts 5. G. caespitosum. 



Stems leafy ; widespread in the higher mts. 



Petals pink ; hairs of pedicels sometimes tipped with yellowish glands 6. G. incisum. 



Petals white; hairs of pedicels tipped with purple glands 7. G. richardsonii. 



1. G. pilosum Forst. Travelers Geranium. Stems slender, leafy, branching, 

 arising from a thick root-crown, 1 to 1%^ feet high ; stems and petioles retrorsely 

 hispidulose, the leaves hispidulose ; leaf -blades 14 to 1 inch wide, incisely 3 or 5- 

 parted, the cuneate segments more or less deeply toothed or cleft; peduncles 

 variable (1 line to II/4 inches long) , shorter or longer than the pedicels, 2-flowered ; 

 petals deep purple, 1 to 2 lines long ; carpels dark brown or black, somewhat sparsely 

 hairy. 



Native of Australasia, sparingly naturalized along the coast, 10 to 300 feet. 

 May-June. 



Locs. — Trinidad sta., Humboldt Co., Tracy 3238; Inverness, Marin Co., Eastwood; Mt. 

 Tamalpais, T. Brandegee; Berkeley, Jepson 9072. 



