From Flora of Indiana (1940) by Charles C. Deam
Probably infrequent to frequent throughout the state. It grows in moist or muddy bare places about ponds, on bars and on the banks of streams and ditches, and in logging roads in woodland. [Deams refers plants with brownish yellow seed and shorter leaves to L. anagallidea.] This species is infrequent and all of my specimens are from the western and southern parts of the state. The habitats are the same as those of [Lindernia dubia], but it prefers a more sandy soil.
Indiana Coefficient of Conservatism: C = 3
Wetland Indicator Status: OBL
Low, branching, glabrous or glandular annual 0.5-2(-3) dm; lvs entire or obscurely few-toothed; sep narrow, 3-nerved, 3-4.5 mm; cor 5-10 mm; later fls often cleistogamous; 2n=18, 32. Wet sandy or muddy shores; Que. and N.H. to N.D., s. to Fla. and Tex., and in the Pacific states. July-Sept. Two rather poorly defined vars., both widespread in our range. Var. dubia: Lvs to 3 cm, at least the lower ones narrowed to the base; pedicels relatively short, mostly 0.5-1.5 cm, surpassed by or only slightly surpassing their subtending lvs; seeds mostly 2-3 times as long as wide. (Ilysanthes d.; I. attenuata) Var. anagallidea (Michx.) Cooperr.: Lvs mostly 6-15 נ3-10 mm, all broadly rounded at base, or the lowermost ones a little narrowed; pedicels mostly 1-2.5 cm, all except sometimes the lowermost ones conspicuously surpassing the subtending lvs; seeds 1.5-2 times as long as wide. (L. anagallidea; Ilysanthes a.; I. inaequalis)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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