GERANIACEAE (GERANIUM FAMILY) 143 



JJ. Stem winged. W. E. L. palustris (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) 



OO. 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. ochroleucus (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 i-3-flowered; pedicels with 4-bracted involucre 

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

 i, split and curled at maturity; stigmas 5. 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. vlscosissimum (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. carolinianum 

 DD. Flowers deep purple; 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-FOOT GERANIUM) 

 EE. Anther-bearing stamens 5; ovary pubescent, not rugose. W. E. 



G. pusillum (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. 



