Hudsonia

Linnaeus

Syst. Nat. ed. 12, 2: 323, 327. 1767

,

Mant. Pl. 1: 74. 1767

Endemic
Etymology: For William Hudson, 1730 – 1793 English botanist
Treatment appears in FNA Volume 6. Treatment on page 398. Mentioned on page 387, 400.
Shrubs, evergreen, sometimes forming clumps wider than high, 0.5–2(–4) dm. Leaves alternate, sessile; blade 1-veined from base, acerose to subulate or scalelike, margins sometimes ± revolute, surfaces glabrescent or hairy, hairs usually simple, not stellate. Inflorescences solitary flowers. Pedicels present or absent; bracts present or absent Flowers chasmogamous; sepals persistent or tardily falling, 5; petals 5, usually yellow, sometimes white; stamens 8–30+; filaments distinct or bases weakly connate; carpels 3; styles 1; stigmas 1, minutely 3-toothed. Capsules 3-valved. Seeds 3–6 per capsule. x = 10.

Distribution

North America.

Discussion

Species 3 (3 in the flora).

Species of Hudsonia are wiry shrubs or shrublets with crowded, acerose to subulate, or scalelike, leaves and the aspect of diminutive gymnosperms or overgrown mosses; they sometimes form relatively extensive stands.

Key

1 Leaf blades mostly lanceolate-ovate, (scalelike), 1–2(–3+) mm; leaves usually appressed (to stems); pedicels 0–1(–5) mm; ovaries glabrous or glabrescent. Hudsonia tomentosa
1 Leaf blades acerose to subulate, 2–7 mm; leaves weakly spreading; pedicels mostly 4–10(–16) mm; ovaries usually hairy > 2
2 Sepal apices acute to acuminate; ovaries proximally glabrous or glabrescent, distally hairy. Hudsonia ericoides
2 Sepal apices acuminate to attenuate; ovaries hairy ± throughout. Hudsonia montana