Hymenolobus procumbens, (L.) Nutt. ex Torrey & A. Gray

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 317

1. H. procumbens (L.) Nutt. ex Torrey & A. Gray , Fl. N. Amer. 1: 117 (1838)

( Hornungia procumbens (L.) Hayek ; Hutchinsia procumbens (L.) Desv. ).

Annual or biennial with sparse unbranched hairs; stems 3-30 cm, procumbent or erect. Lower leaves deeply lyrate-pinnatifid to entire; upper leaves entire. Inflorescence manyflowered. Petals 1-3 mm, spathulate, equalling or slightly exceeding the sepals. Silicula 2-5 mm, elliptical to obovate; valves translucent, with reticulate veins. 2n— 12,24. Frequently maritime. Mainly S. Europe. BI Co G a Ge G r He It Ju Lu Rm Rs (W, K, E) Sa Si.

Extremely variable. A distinctive variant with leaves all ovateelliptical, entire, petals c. 1-5 mm, and silicula 3 mm occurs in Corse, Sardegna and Malta ( var. revelieri (Pamp.)) . Other variants, about which there is wide disagreement in their characters, make the distinction between 1 and 2 difficult.