Flora of the Canadian Arctic Archipelago

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S.G. Aiken, M.J. Dallwitz, L.L. Consaul, C.L. McJannet, R.L. Boles, G.W. Argus, J.M. Gillett, P.J. Scott, R. Elven, M.C. LeBlanc, L.J. Gillespie, A.K. Brysting, H. Solstad, and J.G. Harris

Lentibulariaceae L.C. Richard

English: Bladderwort family.

Lentibulariaceae, Bladderwort family.

Vegetative morphology. Plants 5–10(–15) cm high; perennial herbs; caespitose. Only fibrous roots present. Poorly developed, or at least poorly preserved. Ground level or underground stems absent. Caudex present (small). Aerial stems a small transition zone between taproot and basal leaves. Leaves mainly basal; whorled; dying annually and non-persistent. Petioles absent. Leaf blade bases rounded (slightly). Blades 5–30(–35) mm long, 4–12 mm wide, divaricate, elliptic and spatulate or triangular, flat (or slightly involute), veins pinnate (or slightly involute). Blade adaxial surface with sessile glands (that make the surface sticky and a trap for small insects. These are held and digested by a secretion from the glands. Under the microscope the glands appear as small (pimple-like) bumps on the leaves), glabrous. Blade abaxial surface glabrous. Blade margins glabrous; apices acute.

Reproductive morphology. Flowering stems without leaves. Flowers solitary. Pedicels with glandular hairs. Flowers medium-sized; bilaterally symmetrical (zygomorphic). Sepals conventional; 5; fused (at the base but free at the apex); purple (drying brown); herbaceous (glandular); non-accrescent (becoming leathery with age). Calyx funnel-form; 5-lobed (the odd sepal posterior); hairy. Petals conventional; fused; 5; purple, or blue and yellow (towards the centre); with contrasting markings (colour contrast between yellow throat and blue-purple towards the ends of the petals); 8–15 mm long; spurred (from the lower lip, the spur one-third as long as the petals). Corolla campanulate (two-lipped); 5-lobed. Stamens 2. Ovary superior; carpels 2; syncarpous. Placentation free central (or almost so). Ovules per ovary numerous and tiny. Fruit with calyx persisting; dry; a capsule; ovoid (flask-shaped); black, or brown; 2–3 mm long; 1.5–2.5 mm wide; hairy (with glandular hairs similar to those on the leaves); surface appearing veinless; not distinctly flattened; dehiscent. Seeds numerous; minute, 0.7–0.8 mm long × 0.2–0.2 mm wide; brown; surfaces ridged (honeycomb-like with glandular hairs).


This publication is available on the internet (posted May 2011) and on CD-ROM (published in 2007). These versions are identical in content, except that the errata page for CD-ROM is accessible on the main index page of the web version.

Recommended citation for the web-based version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. NRC Research Press, National Research Council of Canada, Ottawa. http://nature.ca/aaflora/data, accessed on DATE.

Recommended citation for the CD-ROM version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. [CD-ROM] NRC Research Press, National Research Council of Canada, Ottawa.

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