44 GEliANIACE^E. (GERANIUM FAMILY. J 



Tribe I. Five glands of the receptacle alternate with the petals, Ovary deeply 6-lobed, 

 the carpels separating clastically 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. — Gep.anie^. 



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 

 o-eelled loculicidal capsule. Leaves compound, with entire leaflets. Juice sour. — 



OXALIDE.E. 



3. Oxal is. Leaves in ours 3-foliolate. 



1. GERANIUM, L. Craxesiull. 



Annual 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. Carolinianu.nl, 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 pubescence, sparsely intermixed with longer, jiilose 

 hairs : upper leaves deeply 3 to 5-cleft ; 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. caspitosum, James. 



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

 leaves less 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 pubescence usually fine and oppressed, or somewhat glandular and 

 spreading upon the pedicels : leaves 5 to 7-clefl 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. inoisum, Nutt. 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-clefl, pubescent : flowers purple. — 

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

 called G. Fremontii. 



2. EEODIUM, 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-bractod idvo 

 lucre ; petals small. 



