Flora of the Canadian Arctic Archipelago
Scrophulariaceae, Fernweed family.
Published in Suppl. 47. 1782.
Vegetative morphology. Plants (8–)15–50(–100) cm high; perennial herbs; caespitose, or not caespitose. Taproot present. Ground level or underground stems horizontal; 0.5–3 mm wide. Caudex present, or absent. Aerial stems erect, or ascending, or decumbent. Aerial stem trichomes present; spreading, or erect. Leaves heterophyllous, or not heterophyllous; distributed along the stems; alternate; dying annually and non-persistent, or marcescent. Petioles absent. Leaf blade bases truncate, or attenuate. Blades 2.5–40(–50) mm long, 1.2–10 mm wide, spreading or divaricate, linear or lanceolate, flat, veins parallel. Blade adaxial surface glabrous or hairy, hairs pubescent or pilose, hairs simple, hairs sparse or dense, hairs white, or translucent. Blade abaxial surface glabrous or hairy, hairs woolly, hairs very dense, hairs white, hairs wavy, hairs spreading. Blades not lobed or cut into linear divisions. Blade margins with non-glandular hairs, with teeth toward the apex; apices acuminate.
Reproductive morphology. Flowering stems circular or oval in cross section. Flowering stems with leaves. Flowering stems hairy. Flowering stems pubescent, or woolly. Flowering stem hairs simple; longer than the diameter of the flowering stem; white or translucent; glandular hairs absent. Inflorescences spicate, or head-like; lateral; dense; linear; 2–6 cm long; 15–35 mm wide; elongating as the fruit matures. Pedicels present, or absent. Flowers medium-sized; bilaterally symmetrical (zygomorphic). Sepals conventional; 4, or 5; fused; 8–20 mm wide; yellow, or pink, or white; petaloid. Calyx tubular; 5-lobed; hairy. Calyx hairs pubescent, or woolly; non-glandular; white or translucent. Calyx margins ciliate. Petals conventional; fused; same length as the calyx, or longer than the calyx; 5; white, or yellow, or pink; with contrasting markings, or without contrasting markings; 14–27 mm long. Corolla bilabiate; 2-lobed, or 3-lobed, or 4-lobed. Stamens 4; stamen filaments markedly unequal in length, or all equal in length; stamen filaments glabrous. Anthers purple, or yellow; ellipsoid; 1–2 mm long. Nectaries present. Ovary superior; carpels 2; syncarpous. Ovaries ovate; glabrous. Styles 1; 14–25 mm long; straight. Stigmas per ovary 1–2. Placentation axile. Ovules per ovary 10-numerous. Fruit sessile; with calyx persisting; dry; a capsule; ovoid, or broadly lanceolate; yellowish, or brown; 7–12 mm long; 2.5–6 mm wide; surface appearing veinless; dehiscent; opening at the apex and partially or fully down one side. Seeds 1.4–2.5 mm long; brown; surfaces smooth, spinose, reticulate.
Chromosome information. 2n = 24.
Ploidy levels recorded 2x.
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..