Flora of the Palotisc Region 109 



Family 39. GERANIACEAE. 



Herbs: leaves basal, alternate or opposite, often with stipules: 

 flowers solitary or clustered, perfect, regular or irregular, com- 

 monly symmetrical, the parts in fives rarely in threes: sepals equal 

 or unequal: stamens mostly in two sets, those alternate with the 

 petals sometimes sterile: ovary 1, 3-5-lobed and 3-5-celled; ovules 

 2 in each cavity: fruit a capsule: endosperm sparse or none. 



Anthers 10, rarely 5; carpel tails not hairy inside. 176. geranium. 



Anthers 5: carpel-tails bearded inside. 177. erodicm. 



176. GERANIUM. 



Annual or perennial herbs: leaves palmately-lobed, cleft or 

 divided, with stipules: flowers regular, on axillary 1-2-flowered 

 peduncles: sepals 5: petals 5, hypogynous: stamens 10, rarely 5, 

 generally 5 longer and 5 shorter: ovary 5-lobed, 5-celled, beaked 

 with a compound style: capsule 5-celled, each 1 -seeded, and long- 

 tailed, at maturity separating from the long beak of the recep- 

 tacle, splitting from below upward. 



Perennial: flowers large. G. incisum. 

 Annual: flowers small. 



Seeds smooth. G. pusillum. 



Seeds ridged or pitted. G. Carolinian r.M. 



G. incisum Nutt. Stout, perennial, 30-60 cm. high, villous and glandu- 

 lar throughout, somewhat branched above: leaves orbicular, 5-10 cm. broad, 

 5-7-cleft or parted; lobes cuneate, oblong, incisely-lobed or toothed; petioles 

 of the radical leaves elongate, of the cauline short: flowers purple-red, 2-3 

 cm. broad: carpels glandular, 2-3 cm. long. Common on hillsides. 



G. pusillum Burm. Annual spreading finely-pubescent, the weak stems 

 ^-Soc 111 - long; leaves 1-3 cm. broad, 7-9-cleft into equal cuneate-oblong lobes, 

 these 3-toothed at apex: peduncles scattered, 2-flowered: flowers pink or 

 violet, 4-5 mm. broad: sepals acute, not awned: petals notched: anther-bear- 

 ing stamens only 5: carpels small, including the tails about 1 cm. long: seeds 

 smooth. A weed in lawns, along railroads, etc. 



G. carolinianum h. Annual, erect, branched, 15-30 cm. high, pubescent 

 throughout and somewhat glandular: leaves orbicular, 3-6 cm. broad, deeply 

 5-9-cleft; lobes cuneate-oblong, acutely and incisely toothed or lobed; 

 petioles slender: peduncles short, 2-flowered, the inflorescence rather com- 

 pact: flowers rose-colored, 8-10 mm. broad: sepals ovate, acuminate, short- 

 awned, ciliate: carpels hispid, the beaks 2 cm. long: seeds reticulated. Sandv 

 soil along Snake River. 



177. ERODIUM. 



Herbs, generally with jointed nodes: leaves opposite or alternate, 

 with stipules: flowers nearly regular, in axillary umbels: sepals 5: 

 petals 5, hypogynous, the two upper slightly smaller: anthers 5, 



