52 SPRING FLORA 



11. LATHYRUS. Vetchling; Everlasting- Pea. 



Perennial climbing or trailing herbs. Leaves pinnate, mostly 

 terminated by tendrils. Inflorescence racemose. Stamens as 

 in Vicia. Style flattened; hairy along the side next to the 

 distinct stamen. 



Tendrils 2 to each leaf. 



Leaflets oval, obtuse at both ends 1. L. utaheusis 



Leaflets narrowly elliptical, acute at both 



ends 2. L. leucanthus 



Tendrils 1 to each leaf (sometimes undevel- 

 oped) 3. It. brachycalyx 



1. L,. utahensis Jones. Plant smooth, 2-6 ft. high. Leaflets 

 strongly veined; 1-2 inches long; 4-6 pairs; stipules leafy. 

 Peduncles 4-8 inches long, bearing 4-6 white, yellowish-white 

 or purplish flowers that fade to blue on drying, each about % 

 inch long. Mountain slopes. May-July. 



2. It. leucanthus Rydb. Stem winged and conspicuously 4-5- 

 angled; slender; 1-3 ft. long. Leaves terminated by 2 tendrils; 

 leaflets 4-8; veiny; narrow to ovate-lanceolate. Stipules semi- 

 sagittate. Flowers 2-6, in loose long-peduncled racemes; pink- 

 purple to nearly white. Legume flat; sessile. In open woods 

 near streams. May-July. 



3. L.. brachycalyx Rydb. Perennial from a creeping rhizome. 

 Stem unbranched or slightly branched; sharply 4-angled. 

 Leaves with pubescent semi-sagittate stipules and a somewhat 

 winged rhachis. Leaflets 2-5 pairs, strongly veined. Raceme 

 short, 2-6 flowered. Corolla purple, fading- to blue. On rather- 

 dry mountain sides. May-June. 



ORDER GERANIAL.ES. 



GERANIACEJE. Geranium Family. 



Herbs with stipulate leaves. Flowers regular, with 

 hypogynous parts. Sepals 5, imbricated. Petals 5. 

 Stamens 10, or only 5 with anthers. Pistil with 5 styles 

 adnate to a central column from which they separate 

 at maturity. Ovaries 2-ovuled, but each maturing a 

 single seed. 



Leaves pinnately divided 1. Erodium 



Leaves palmately parted or cleft 2. Geranium 



1. ERODIUM. Filaree; Alfilaria; Pin Clover. 



Winter annuals (or biennials) from a tap-root, with jointed 

 nodes and opposite leaves. Inflorescence axillary; umbellate. 

 Flowers regular or nearly so. Fertile stamens 5, alternate 

 with the 5 sterile ones, which consist of scale-like filaments. 

 Styles bearded inside; in fruit, twisting spirally when dry and 

 untwisting when moistened. 



