GERANIACEAE. 229 



Geranium molle L. Annual, pubescent with white hairs; stems spreading, 

 15-30 cm. long; leaves orbicular, 2-3 cm. broad, deeply cleft, the lobes crenately 

 toothed, obtuse; sepals ovate-oblong, villous, not aristate; petals pink-purple, 

 notched at apex, scarcely longer than the sepals; stamens 10; carpels trans- 

 versely rugose, glabrous; seeds striate. 



Introduced from Europe, common. 



Geranium dissectum L. Annual, somewhat pubescent; stems decumbent, 

 or ascendent, 15-45 cm. long; leaves 5-7-parted, the segments deeply cleft 

 into narrow very acute usually curved divisions; sepals ovate, acuminate; 

 petals purple; carpels pubescent. 



Abundantly introduced from Europe. 



Geranium carolinianum L. 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 

 compact; flowers pink, 8-10 mm. broad; sepals ovate, acuminate, short-awned, 

 ciliate; carpels hispid, the beaks 2 cm. long, tipped with a short slender style; 

 seeds reticulated. 



Common in sandy soil. 



Geranium bicknellii Britt. Similar to G. carolinianum; peduncles scat- 

 tered, elongate; flowers in pairs, the pedicels much longer than the calyx; 

 petals rose-colored; beak of the fruit tipped with a long slender style 4-6 mm. 

 long. 



In open woods. 



Geranium laxum Hanks. Annual; stems procumbent, 30-60 cm. long, 

 retrorsely pubescent; leaves reniform in outline, 2.5-5 cm. broad, parted into 

 linear segments; pedicels glandular-hirsute; sepals ovate, aristate, glandular- 

 pubescent, the outer 7-8 mm. long; petals purple; carpels hirsute; seeds reticu- 

 late. 



Oyhut, Chehalis County, Washington, Lamb, and south to California. 



301. ERODIUM. 



Herbs, generally with jointed nodes; leaves opposite or alter- 

 nate, with stipules; flowers regular, in axillary umbels; sepals 5; 

 petals 5, hypogynous; anthers 5, the 5 shorter stamens sterile 

 or wanting; ovary 5-lobed, 5-celled, beaked by the united styles; 

 tails of the carpels bearded on the inner side, becoming twisted. 



Erodium cicutarium (L.) L'Her. Alfilaria. Filaree. Branched and 

 spreading from the base, hairy-pubescent, the weak stems 10-60 cm. long; 

 leaves pinnate, 3-15 cm. long, the leaflets pinnatifid into narrow acute lobes; 

 peduncles generally longer than the leaves, bearing 2-10 pink flowers; sepals 

 acute, nearly as long as the entire petals, these 4 mm. long; carpels puberulent, 

 the tails 5-7 cm. long, spirally-twisted when ripe. 



Introduced from Europe; very common. 



Family 52. OXALIDACEAE. WOOD SORREL FAMILY. 

 Annual or perennial low herbs (in ours) with sour watery 

 juice; leaves delicate, palmate, usually trifoliolate, alternate 

 or radical; flowers perfect, regular, 5-merous, but with 10 or 15 

 stamens; ovary superior, 5-celled, the carpels 2-many-ovuled, 

 usually distinct above. 



