44 GEKANIACE^E. (GERANIUM FAMILY.^ 



Tribe I. Five glands of the receptacle alternate with the petals. Ovary deeply 5-lobed, 

 tlie carpels separating elastically at maturity from the long-beaked and indurated central 

 axis from below upward : the styles forming long tails which become revolute upwards 

 or spirally twisted. — Geranie^e. 



1. Geranium. Fertile stamens 10. Tails of the carpels not bearded. 



2. Erodium* Fertile stamens 5. Tails of the carpels bearded inside. 



Tribe II. No glands alternate with the petals. Ovary not lobed, becoming in fruit a 

 j-celled loculicidal capsule. Leaves compound, with entire leaflets. Juice sour. — 



OXALIDEJE. 



3. Oxalis. Leaves in ours 3-foliolate. 



1. GERANIUM, L. Craxesbill. 



Animal or perennial herbs, with enlarged joints, palmately lobed and mostly 

 opposite leaves, scarious stipules, and 1 to 3-flowered peduncles. 

 * Annual or biennial : flowers small. 



1. G. Carolinianum, L. Decumbent or ascending, diffusely branched, 

 pubescent: leaves palmately 5 to 7-parted, the divisions cleft into oblong- 

 linear lobes : petals rose-color, equalling the awned sepals : carpels hairy. — 

 Across the continent. 



Var. longipes, Watson. Peduncles usually solitary, and, with the pedi- 

 cels, much elongated. — Bot. King's Exp. 50. Colorado and southward. 

 * * Perennial: flowers large. 



2. G. Fremontii, Torr. Rather stout, more or less pubescent through- 

 out, with a short, close, glandular jnibescence, sparsely intermixed ivith longer. ]>ilose 

 hairs: upper leaves deeply 3 to 5-cfeJl ; radical ones 1 -cleft, segments 3-lobed or 

 incised : petals light or deep purple. — From Colorado to Wyoming and 

 Idaho. Much that is called by this name is G. ccespitosum, James. 



Var. Parryi, Engelm. Stems and peduncles plainly glandular-villose : 

 leaves l^-ss deeply cut, ultimate lobes or teeth ovate, somewhat obtuse. — Gray's Peak, 

 Colorado. 



3. G. Richardsoni, Fisch. & Mey. Taller but not so stout nor so hairy, 

 with the pubescmce usually fine and oppressed, or somewhat glandular and 

 spreading upon the pedicels : leaves 5 to 7-eleJl nearly to the base, the broad 

 lobes more or less incisely toothed: petals purple or sometimes white. — In the 

 mountains from New Mexico to British America and westward. 



4. G. incisum, Xutt. Closely resembling the last, but more villous and 

 glandular-pubescent : leaves rather more narrowly and laciniately cut : petals usually 

 deep purple. — From California through Montana to the Saskatchewan. 



5. G. CSespitOSUm, James. More slender and more diffusely branched 

 radical leaves smaller, reniform, deeply 5 to 7-clefi, pubescent : flowers purple — 

 New Mexico and northward. Includes many of the forms which have been 

 called G. Fremontii. 



2 ERODIUM, L'Her. Storksbill. 



Sterile stamens scale-like. Tails of the carpels becoming spirally twisted. — 

 Leaves pinnate, peduncles umbellately 4 to 8-flowered, with a 4-bracted invo- 

 lucre ; petals small. 



