All Floras      Advanced Search
FNA Vol. 6 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 6 | Cistaceae

4. Hudsonia Linnaeus, Syst. Nat. ed. 12. 2: 323, 327. 1767; Mant. Pl., 1: 74. 1767.

[For William Hudson, 1730–1793, English botanist] [For William Hudson, 1730–1793, English botanist]

John L. Strother

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.

Species 3 (3 in the flora): North America.

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.

SELECTED REFERENCES Morse, L. E. 1979. Systematics and Ecological Biogeography of the Genus Hudsonia (Cistaceae), the Sand Heaths. Ph.D. dissertation. Harvard University. Skog, J. E. and N. H. Nickerson. 1972. Variation and speciation in the genus Hudsonia. Ann. Missouri Bot. Gard. 59: 454–464.

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

Lower Taxa


 |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |