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Claytonia
See list of 3 species in this genusClaytonia perfoliata Donn ex Willd. ssp. perfoliata was attributed to NH based on the following specimen—7 Aug 1915, Wellman s.n. ( NEBC!). The label states it was a garden weed and is not here taken as naturalized.
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1a. Plants annual or biennial from a minute, tuber-like structure 1–5 mm in diameter or perennial from rhizomes; inflorescence multibracteate
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1b. Plants perennial from globose tubers 10–50 mm in diameter; inflorescence unibracteate (rarely with an additional bract)
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2a. Leaf blades linear to narrow-oblanceolate, 2–15 mm wide [Fig. 804]; bract subtending lowest pedicel of inflorescence herbaceous, firm
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2b. Leaf blades broad-oblanceolate to spatulate-oblong or oval, (5–) 10–30 (–33) mm wide; bract subtending lowest pedicel of inflorescence scarious, weak
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Each photo represents one species in this genus.