nearly glabrous, adaxial faces sparsely scabrellous or glabrate, both usually resin-gland-dotted. Heads discoid (pedunculate, each subtended by 3–8+, ± foliaceous
3 KB (316 words) - 20:50, 5 November 2020
natural population of S. officinalis failed to produce resin (N. Zeybek 1970). To my knowledge, resin induction in any of our native species has not been
9 KB (923 words) - 23:45, 5 November 2020
developed, subepidermal resin pocket nearly as wide as bracts, sometimes a central pocket and 2+ smaller, lateral ones (resin pockets sometimes formed
3 KB (242 words) - 19:24, 6 November 2020
Wilson-Ramsey Copyright: Flora of North America Association Herbs, perennial; resin canals apparent. Stems erect or ascending to prostrate or arching, simple
4 KB (312 words) - 23:44, 5 November 2020
to rounded; surfaces abaxially glabrous to tomentose, lightly to heavily resin-coated. Inflorescences: staminate catkins in 1 cluster of 2–4, formed late
5 KB (379 words) - 14:55, 29 February 2024
the adaxial side of a leaf blade at its junction with the petiole, secrete resins onto young, expanding leaves (J. D. Curtis and N. R. Lersten 1978). Poplars
29 KB (2,619 words) - 23:31, 5 November 2020
ciliate, faces glabrous or scabrous, gland-dotted (sometimes in ± deep, resin-filled pits, sometimes sessile) or pustulate, often ± resinous. Heads discoid
6 KB (460 words) - 14:15, 7 March 2024
(yellowish). Winter buds yellow-brown, usually densely stiffly hairy, resinous (resin yellow); terminal buds (4–)7–11(–14) mm; flowering buds separated on branchlets
6 KB (715 words) - 18:15, 6 November 2020
these angled, projected forward, sheath absent; apex rounded or notched; resin canals 1. Cones borne on year-old twigs. Pollen cones solitary, globose,
4 KB (315 words) - 21:24, 5 November 2020
weakly developed, non- or weakly spinulose projection, gland-dotted, without resin pockets or pockets small, weakly developed (var. decumbens and var. menziesii)
5 KB (211 words) - 20:58, 5 November 2020
margins entire or dentate (pinnately lobed or dissected), faces abaxially resin-gland-dotted, adaxially often tomentose. Heads discoid, in leafy-bracted
4 KB (379 words) - 20:49, 5 November 2020
subapical patch, midnerves evident on proximal 1/2 or throughout, subapical resin ducts 0 or slightly darker, thickened and expanded, (margins membranous,
4 KB (348 words) - 19:32, 6 November 2020
Stems ascending, green, soon becoming tan, glabrous or puberulent, sometimes resin-dotted, often resinous. Leaves ascending, spreading, or deflexed; sessile;
5 KB (397 words) - 19:25, 6 November 2020
usually densely strigose and gland-dotted, each margin usually with an adaxial resin gland; receptacles plus paleae and florets = discs, 5–70 × 5–18 mm). Ray
5 KB (342 words) - 21:09, 5 November 2020
hemispheric, paleate; paleae ± lanceolate, ± navicular (each with central resin duct). Ray florets 0. Disc florets mostly 60–250+, bisexual, fertile; corollas
3 KB (289 words) - 20:57, 5 November 2020
conic, paleate; paleae ± folded (carinate, each with central, red-brown resin duct). Ray florets 12–18+, neuter or styliferous and sterile; corollas orange
4 KB (352 words) - 20:56, 5 November 2020
apex rounded to nearly acute; stalk 1–3 mm; scales 2–3, equal, valvate, resin-coated. Leaf blade narrowly ovate to elliptic, base cuneate to narrowly rounded
4 KB (326 words) - 15:00, 29 February 2024
annual or perennial, not cushion- or mat-forming, aquatic, not succulent; resin canals obvious. Rhizomes absent; roots fibrous. Stems mostly submerged, ascending
3 KB (295 words) - 23:44, 5 November 2020
glabrous (pericarps with myxogenic cells in longitudinal rows, without resin sacs); pappi 0. x = 9. Introduced; s, w Europe, n Africa. Species 2 (2 in
4 KB (296 words) - 20:56, 5 November 2020
Disc florets (13–)20–70, bisexual, fertile; corollas yellow (with orange resin ducts), tubes 2 times longer than narrowly funnelform throats, lobes 5, erect
4 KB (398 words) - 21:05, 5 November 2020