37. LiNAGEAE 99 



3. Leaves palmately lobed; carpels attached to the styles; petals 



2-7 mm long. 



4. Sepals awn-tipped (the tips 1-3 mm long); seeds reticulate. 



5. Fruiting pedicels much longer than the calyx; beak of 



mature style-column 4-6 mm long; fields and open 



woods, occasional; Cook and Lake counties. June-Aug. 



...G. bicknellii Britt. 



5. Fruiting pedicels shorter than, or slightly longer than, the 

 calyx; beak oi mature style-column 1-2 mm long; road- 

 sides, fields, and open woods. May-July 



G. carolinianum L. 



4. Sepals merely callus-tipped; seeds smooth or nearly so; 

 carpels pubescent, not rugose; style-column beakless; waste 



places; nat. from Eur. May-Aug. G. pusillum Burm.f. 



3. Leaves 3-divided; carpels deciduous from the styles; petals 8- 

 10 mm long; moist ground, occasional; adv. from Eur. 

 June-Sept G. robertianum L. 



2. Erodium L'Her. — Storksbill 

 E. cicutarium (L.) L'Her. Waste places; nat. from Eur. May-Aug. 



37. Linaceae Dumort. — Flax Family 



1 . Linum L. — Flax 



1. Petals blue (or white), 1-1.5 cm long; capsules 8-12 mm in 

 diameter. 

 2. Perennial; flowers 2-3 cm in diameter; sepals obtusish, ciliate; 

 occasionally found as an escape from cult.; introd. from Eur. 

 June-Aug. Perennial Flax L. perenne L. 



2. Annual; flowers 10-15 mm in diameter; sepals acute, the inner 



olten ciliate; roadsides and waste places, occasional; introd. 



trom Eur. June-Aug. Cultivated Flax L. usitatissimuiii L. 



1. Petals yellow, 4-8 min long; capsules 3-6 mm in diameter. 



3. Styles distinct; leaves without dark stipular glands; false septa 



of the capsule nearly complete, not ciliate; plants perennial. 

 4. Inner sepals minutely glandular-ciliolate; sandy soil, local. 



July-Aug. [L. medium var. texanum. (Planch.) Fern.] 



L. medium (Planch.) Britt. 



4. Sepals entire. 



5. Outer sepals 3-3.5 mm long at maturity; dry open woods, 

 local; chiefly s. 111.; also Cook and Lake counties. June- 

 Aug L. virginianum L. 



5. Outer sepals 2-2.5 mm long at maturity; damp ground, 

 rare; Jackson, Johnson, and Pope counties. July-Aug. 



L. striatum Walt. 



3. Styles united below; outer sepals 4-6 mm long, lanceolate, 

 acuminate, strongly glandular-ciliolate; leaves with dark 

 stipular glands; false septa ol the capsule incomplete, con- 



