LINACEAE. 155 



Perennials; flowers large. G. viscosissimum. 

 Annuals; flowers small. 



Peduncle short; inflorescence compact. G. carolinianum. 

 Peduncles long; inflorescence loose. 



Seeds reticulately ridged; fruits 2 cm. long. G. bicknellii. 



Seeds smooth or nearly so; fruits 1 cm. long. G. pusillum. 



Geranium viscosissimum Fisch. & Mey. Stout, perennial, 30-60 cm. 

 high, villous and glandular 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. 



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. Sandy soil in copses. 



Geranium bicknellii Britt. Similar to G. carolinianum; peduncles 

 scattered, 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 pusillum Burm. f. Annual spreading finely-pubescent, the weak 

 stems 15-30 cm. 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-bearing stamens only 5; carpels canescent, small, including the tails 

 about 1 cm. long; seeds smooth. A weed in lawns and waste places. 



217. 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 and becoming 

 common. 



Family 48. LINACEAE. FLAX FAMILY. 



Herbs or rarely shrubs; leaves all simple and entire, mostly 

 alternate; stipules none; flowers perfect, regular, symmetrical, 

 in axillary or terminal cymes, or panicles; sepals 5 or 4; petals 

 as many as and alternate with the sepals; stamens of the same 



