Pennsylvania as non-persistent introductions. The plants are somewhat succulent, gland-dotted annuals with stems decumbent to procumbent, leaves oblanceolate to
18 KB (990 words) - 20:56, 5 November 2020
glabrate or glabrous, usually resin-gland-dotted (sometimes ± pitted), adaxial faces ± scabrellous or glabrate, sometimes resin-gland-dotted (rarely pitted).
9 KB (628 words) - 20:50, 5 November 2020
faces glabrous or hairy (not villous), often gland-dotted (pericarps sometimes with myxogenic cells, without resin sacs; embryo sac development monosporic);
11 KB (1,203 words) - 20:57, 5 November 2020
structures have been called glands, glandular hairs, glandular trichomes, punctae, resin dots, and so on. Sometimes, the glands are embedded in epidermal
270 KB (5,940 words) - 20:46, 31 January 2022
juvenile leaves linear, flattened, spreading; often with solitary abaxial resin gland; resin canal present. Pollen cones maturing and shed annually, solitary,
12 KB (1,137 words) - 20:26, 28 December 2023
nerved, or ribbed (glabrous or hirsutulous to strigillose, sometimes resin-gland-dotted as well); pappi usually persistent, usually in 2 series (outer
7 KB (548 words) - 20:50, 5 November 2020
apices sometimes green, faces glabrous or tomentose, sometimes gland-dotted, sometimes with resin pockets. Receptacles flat, pitted, epaleate. Disc florets
7 KB (461 words) - 20:58, 5 November 2020
rounded, obtuse, or truncate teeth tipped by resin globules. Sporadically, individual plants may have some teeth resin-tipped and some teeth apiculate; such specimens
18 KB (1,335 words) - 21:07, 5 November 2020
ribs 2–3 or 5–10, faces glabrous or gland-dotted (pericarps with myxogenic cells only in S. potentilloides, without resin sacs); pappi usually 0 (of 3–5 subulate
5 KB (375 words) - 20:57, 5 November 2020
of the distal gland, long-stipitate-glandular to hairs with stalks clearly visible, 1–3-times longer than the diameter of the distal gland. Anderson, L
19 KB (930 words) - 21:05, 5 November 2020
scalelike, rhomboid, free portion of long-shoot leaves to 4 mm; abaxial gland present or absent. Pollen cones with 4–10 pairs of sporophylls, each sporophyll
5 KB (427 words) - 21:23, 5 November 2020
apices truncate, usually densely strigose and gland-dotted, each margin usually with an adaxial resin gland; receptacles plus paleae and florets = discs
5 KB (342 words) - 21:09, 5 November 2020
require microscopic observation, such as the distribution of glands (sometimes referred to as “resin dots”) and the color of anther appendages; they still are
28 KB (884 words) - 21:11, 5 November 2020
cordate, palmately lobed, sometimes unlobed; surfaces abaxially resin-dotted and×or gland-dotted. Inflorescences: staminate inflorescences axillary and terminal
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(without resin sacs). Cypselae cylindro-obconic, ribs 5–8(–10), faces glabrous, usually gland-dotted (pericarps without myxogenic cells or resin sacs; embryo
4 KB (437 words) - 20:57, 5 November 2020
sessile; margins entire or dentate to pinnatifid or palmatifid (faces often gland-dotted). Heads usually heterogamous (disciform or radiate), sometimes homogamous
24 KB (1,707 words) - 21:07, 5 November 2020
serrate, sometimes ciliate, faces glabrous or scabrous, gland-dotted (sometimes in ± deep, resin-filled pits, sometimes sessile) or pustulate, often ± resinous
6 KB (460 words) - 14:15, 7 March 2024
spreading to ascending or erect, green when young, highly branched, glabrous, gland-dotted (sometimes in pits), resinous. Leaves ascending-spreading; blades
4 KB (348 words) - 19:32, 6 November 2020
tubes ± cylindric (not basally dilated, ± gland-dotted), throats campanulate, lobes 5, deltate (without resin sacs). Cypselae dimorphic: outer (ray) 3-angled
3 KB (341 words) - 20:57, 5 November 2020
(rarely entire), apices obtuse to acute, abaxial or both faces usually resin-gland-dotted. Heads ± discoid, sessile, not individually bracteate, in clusters
4 KB (326 words) - 20:50, 5 November 2020
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
outer shorter, all resin-nerved). Receptacles conic, paleate (paleae falling, linear, flattish or weakly conduplicate, scarious, resin-nerved). Ray florets
3 KB (219 words) - 21:12, 5 November 2020
tubes ± cylindric (basally ± dilated, ± gland-dotted), throats funnelform, lobes 5, narrowly deltate (each with a resin sac). Cypselae dimorphic: outer (ray)
4 KB (303 words) - 20:57, 5 November 2020
sometimes with weakly developed, non- or weakly spinulose projection, gland-dotted, without resin pockets or pockets small, weakly developed (var. decumbens and
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 racemiform
4 KB (379 words) - 20:49, 5 November 2020
sometimes spinulose-aristate, usually not gland-dotted, usually with single, strongly developed, subepidermal resin pocket nearly as wide as bracts, sometimes
3 KB (242 words) - 19:24, 6 November 2020
usually branched distally, hirtellous to pilosulous (hairs basifixed, some gland-tipped). Leaves mostly cauline; alternate; petiolate or sessile; blades obovate
3 KB (257 words) - 20:57, 5 November 2020
dentate or entire, faces loosely tomentose or glabrate, puberulent and resin-gland-dotted. Heads discoid, in (leafy-bracted) corymbiform or paniculiform
4 KB (378 words) - 20:49, 5 November 2020
sometimes reddish, tubes ± cylindric (± gland-dotted), throats campanulate, lobes 5, deltate (without resin sacs). Cypselae ± columnar, ribs 7–12, faces
3 KB (247 words) - 20:57, 5 November 2020
spinose-toothed; all with apices rounded to acute, faces glabrous or glabrate, resin-gland-dotted. Heads pseudo-radiant (see here at corollas), ± pedunculate, not
3 KB (239 words) - 20:50, 5 November 2020
rounded to acute, abaxial faces ± hirtellous to densely piloso-strigillose, resin-gland-dotted, adaxial faces ± scabrellous or glabrate. Heads discoid, ± pedunculate
3 KB (236 words) - 20:50, 5 November 2020
(proximally tapered), ribs 4, faces gland-dotted between ribs, especially adaxially (pericarps without myxogenic cells or resin sacs; embryo sac development monosporic);
4 KB (413 words) - 15:37, 5 January 2023
sometimes glabrate or glabrous [sericeous] (hairs mostly medifixed) and gland-dotted. Leaves cauline [mostly basal]; alternate; petiolate or sessile; blades
3 KB (289 words) - 20:57, 5 November 2020
section), ribs (4–)5–10(–12+), faces usually gland-dotted, sometimes glabrous (pericarps without myxogenic cells or resin sacs, embryo sac development tetrasporic);
5 KB (365 words) - 20:56, 5 November 2020
toothed (rarely entire), apices obtuse to acute, abaxial faces usually resin-gland-dotted. Heads ± discoid, sessile, not individually bracteate, in clusters
3 KB (263 words) - 20:50, 5 November 2020
tubes ± cylindric (basally dilated, not gland-dotted), throats ± campanulate, lobes (2–)5, deltate (without resin sacs). Cypselae mostly columnar to obovoid
3 KB (286 words) - 20:57, 5 November 2020
cylindric (not basally dilated, usually gland-dotted), throats ± campanulate, lobes 5, deltate (without resin sacs). Cypselae ± columnar, ribs 8–10 (not
3 KB (214 words) - 20:57, 5 November 2020
0.5–1.3 mm diam. Leaves with conspicuous, pitlike, abaxial gland that produces drop of resin, slightly glaucous. Pollen cones 2–3 × 2–2.5 mm; pollen sacs
2 KB (181 words) - 21:24, 5 November 2020
reddish brown to gray, glabrous or sparsely hairy, usually covered with resin-filled pits. Leaves (moderately crowded) ascending to spreading; blades linear
4 KB (323 words) - 20:59, 5 November 2020
8–1.5 mm, inner lance-ovate, 1–5 × 0.8–1.5 mm. Paleae 3–4.3 × 1.5–3 mm, resin glands oval, 1–1.8 mm. Ray florets 4–14; corollas yellow, purplish yellow, or
3 KB (301 words) - 19:19, 6 November 2020
young, becoming dark brown then gray, branched, twigs stipitate-glandular, resin coated. Leaves ascending; blades elliptic to obovate, 9–18 × 2.5–4 mm, midnerves
3 KB (302 words) - 21:05, 5 November 2020
portion of phyllary midveins in many species with elongate, glutinous resin gland, usually milky in fresh material but dark brown to black when dry). Receptacles
56 KB (1,993 words) - 20:52, 5 November 2020
Stems erect to ascending, green when young, fastigiately branched, glabrous, gland-dotted, resinous. Leaf blades ascending, sometimes spreading when older,
3 KB (303 words) - 21:06, 5 November 2020
fibrous with age. Stems ascending, green becoming tan, glabrous or puberulent, resin-dotted to resinous. Leaves ascending to spreading; sessile; blades with faint
3 KB (303 words) - 21:02, 5 November 2020
becoming whitish tan with age), simple, glabrous or scabridulous, often resin-coated. Leaves basal and cauline (stiffly erect to ascending); alternate;
4 KB (475 words) - 21:02, 5 November 2020
0.5–1 mm diam. Leaves with conspicuous, pitlike, abaxial gland that produces drop of resin, sometimes glaucous. Pollen cones 2–3 × 2 mm; pollen sacs 3–5
2 KB (182 words) - 21:21, 5 November 2020
ochroleucous, distally red to purple, tubes cylindric (stipitate-glandular or gland-dotted), throats funnelform, lobes 5, deltate. Cypselae dimorphic: outer
3 KB (245 words) - 20:57, 5 November 2020
orbiculate to spatulate or linear), ultimate margins entire, faces ± villous and gland-dotted. Heads disciform, usually (2–12+) in ± leafy, racemiform to spiciform
3 KB (304 words) - 20:57, 5 November 2020
oblong to ellipsoid, almost isodiametric, sometimes with amber or black gland on connective; staminode fascicles 0 [3]; ovary 2–5-merous; placentation
9 KB (862 words) - 23:19, 5 November 2020
throats urceolate to campanulate, lobes 4–5 (spreading), deltate [with resin sacs]. Cypselae obconic, slightly compressed (usually asymmetric, apices oblique)
5 KB (390 words) - 20:57, 5 November 2020