Lithospermum arvense, corn gromwell

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Intermountain Flora
Strigose annual, 1-7 dm tall, simple or sparsely branched, with 1-several stems from the base, the central one generally the largest; lowermost leaves oblanceolate and soon deciduous, the others generally oblong, linear-oblong, or lanceolate, sessile or nearly so, mostly 1.5-6 cm long and 2-15 mm wide; flowers barely pedicellate, obliquely set in the axils of the more or less reduced upper leaves, the inflorescence crowded at first, elongate and open in fruit; corolla white or bluish-white, 5-8 mm long, funnelform, the limb 2-4 mm wide, the tube bearing 5 hairy lines within; fornices wanting; nutlets gray-brown, ca 3 mm long, wrinkled, pitted, and sometimes tuberculate, with a prominent ventral keel; 2 n = 28.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1984) "Intermountain Flora" pg. 290, vol. 4, The New York Botanical Garden New York.