in J. Torrey and A. Gray, Fl. N. Amer. 1: 663. 1840.

Etymology: For Hardy B. Croom, 1797–1837, the discoverer
Treatment appears in FNA Volume 26. Treatment on page 466. Mentioned on page 12.
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Herbs perennial. Stems erect. Basal leaves scalelike, venation parallel. Cauline leaves 3–6 near stem tips; blade cordate to broadly elliptic, venation palmate. Cymes 2–3-flowered. Flowers: ovary globose [to broadly conic]; style short, thick; stigmas 2–3, capitate; pedicel jointed, bracteolate. Seeds 1–4.


North America, se Asia (China, Japan).


Species 3 (1 in the flora).

Selected References


Lower Taxa