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Cynoglossum
See list of 4 species in this genus-
1a. Inflorescence consisting of (1–) 3 (–4) helicoid cymes borne on a common, terminal peduncle (i.e., none borne in the axils of leaves); mericarps ascending, concealing the persistent style at maturity; rounded on the outer surface [Fig. 493], without a raised, marginal rim
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1b. Inflorescences of several helicoid cymes, the lower borne in the axils of the upper leaves and on short axillary branches; mericarps horizontally oriented and not concealing the persistent style at maturity, ± flattened on the outer surface, with a raised, marginal rim
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2a. Corolla red-purple (rarely white); calyx 3–5 mm long at anthesis
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2b. Corolla blue to blue-purple (rarely white); calyx 2–3 mm long at anthesis
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3a. Limb of corolla 8–10 mm wide; leaf blades gray-green, densely pubescent; inflorescences numerous, panicle-like; mericarps 4–5 mm long
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3b. Limb of corolla 2.5–4.5 mm wide; leaf blades green to gray-green, sparsely pubescent; inflorescences fewer, less crowded, raceme-like, paniculate; mericarps 3–4 mm long
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Each photo represents one species in this genus.