GERANIACEAE (GERANIUM FAMILY) 143 



JJ. Stem winged. W. E. L. paiustris (marsh pea) 



CC. Stipules wide, ovate or somewhat half-hastate; their lobes wider than lanceo- 

 late, acute or acuminate: plant glabrous throughout. 

 O. Leaflets 10-20, peduncles shorter than the leaves; leaflets not cuspidate; 

 stipules acuminate. W. C. L. polypbyllus (many-leaved pea) 



00. Leaflets 6-12. 



P. Leaflets elliptic to linear, cuspidate; stipules acuminate; peduncles exceeding 

 the leaves. E. L. pauciflorus 



PP. Leaflets ovate-oblong, not cuspidate; stipules acute; peduncles not exceed- 

 ing the leaves. W. L. maritimus (beach pea) 

 BB. Flowers ochroleucous. W. E. L. ochioleucus (cream-colored pea) 



GERANIACEAE (Geranium Family) 



Herbs. Leaves toothed to compound. Flowers perfect, regular 

 or irregular, on axillary peduncles. Sepals 5. Petals 5. Stamens 

 5 or 10; filaments either dilated or monadelphous at base. Ovary 

 superior; carpels 5, united around a central axis; ovules 2 in each 

 cell. Capsule 5-lobed; carpels separating at maturity from the 

 long-beaked central axis from below up; styles forming long carpel 

 tails which become revolute or spirally twisted. 



A. Leaves palmately-compound or -lobed or -veined. GERANIUM (p. 143) 



AA. Leaves pinnately-compound or -lobed or -veined. ERODIUM (p. 143) 



GERANIUM (Geranium) 



Leaves simple, alternate, usually lobed to deeply dissected; stipules 

 conspicuous. Peduncles 1-3-flowered; pedicels with 4-bracted involucre 

 at base. Sepals persistent. Stamens s, or 5 longer and 5 shorter. Style 

 I, split and curled at maturity; stigmas S- Seed i in each cell. — (Gk. 

 geranos — a crane ; referring to the cranelike beak of the pod.) 



A. Annual; petals i cm. or less long. 



B. Plants single or scarcely tufted. W. E. G. viscosisslmum (sticky geranium) 

 BB. Plants caespitose-tufted. E. G. fremontii 



AA. Perennial; petals 1.5-2 cm. long. 



C. Sepals awn-pointed; seeds reticulate or pitted. 



D. Flowers pale purple; seeds minutely reticulate. W. C. E. G. carolinlanuin 

 DD, Flowers deep purplq; seeds deeply pitted. W. 



* G. dissectum (split-leaf geranium) 



CC. Sepals awnless; seeds smooth or striate. 



E. Anther-bearing stamens 10; ovary glabrous, transversely rugose. W. 



G. molle (dove's-poot geranium) 

 EE. Anther-bearing stamens s; ovary pubescent, not rugose. W. E. 



G. puslllum (small geranium) 



ERODIUM (Heron's-bill) 



Leaves opposite or alternate, simple or compound; stipules present. 

 Flowers in axillary umbels, nearly regular. Upper 2 petals slightly smaller. 



