Lessingia tenuis |
Lessingia |
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spring lessingia |
lessingia |
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Habit | Plants 2–15 cm. | Annuals, mostly 2–90 cm; taprooted. | ||||||||||||||||||||||||||||||||||||||||||||
Stems | erect, green to tan, glabrous or villous. |
erect or decumbent, simple or branched from bases or distally, glabrous or villous to woolly. |
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Leaves | basal withering by flowering; cauline margins entire or dentate to pinnately lobed, faces sometimes gland-dotted, abaxial villous to tomentose. |
basal and/or cauline (basal rosettes sometimes withering by flowering); alternate; petiolate or sessile; blades 1-nerved, ovate or obovate to lanceolate, linear, or subulate (bases sometimes clasping), margins entire or dentate to pinnately lobed, abaxial faces glabrous or sparsely tomentose to woolly, sometimes stipitate-glandular. |
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Involucres | obconic, 4–7 mm. |
hemispheric, obconic, campanulate, or narrowly cylindric, 4–13 mm diam. |
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Receptacles | slightly convex, pitted, epaleate. |
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Ray florets | 0. |
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Disc florets | 10–25; corollas yellow (occasionally pink or suffused with purple in peripheral florets; tubes with brown-purple band inside); style-branch appendages truncate-penicillate, 0.1–0.2 mm. |
3–40, bisexual, fertile; corollas white, pink, lavender, or yellow, tubes shorter or longer than funnelform to tubular throats (each with or without colored band inside, limbs frequently palmately expanded in peripheral florets), lobes 5, erect or spreading, lanceolate; style-branch (linear) appendages lanceolate (0.3–1.3 mm) or truncate-penicillate (0.1–0.4 mm). |
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Phyllaries | purple-tipped, faces glabrous or villous, gland-dotted; inner scarious. |
10–55 in 4–8 series, erect or recurved (green to purple), 1-nerved (flat), oblong, ovate, or lanceolate, unequal, herbaceous, scarious, or rarely cartilaginous (apices obtuse to acute), faces glabrous or villous to woolly, sometimes stipitate-glandular. |
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Heads | borne singly, at ends of branchlets. |
discoid (or ± radiant, corollas of outer florets sometimes enlarged), borne singly or in ± corymbiform arrays (terminal or sessile to subsessile in axils of leaves). |
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Cypselae | (white to tan or mottled purple-brown) cuneiform to linear, not compressed, smooth or obscurely 5–10-nerved, faces puberulent to pilose; pappi persistent, of 3–55, distinct or basally connate, tan to reddish, barbellate, apically attenuate bristles in 1–2 series, sometimes forming coronas. |
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Pappi | tan, equal to or longer than cypselae. |
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x | = 5, 6. |
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2n | = 10. |
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Lessingia tenuis |
Lessingia |
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Phenology | Flowering Apr–Jul. | |||||||||||||||||||||||||||||||||||||||||||||
Habitat | Openings, chaparral, woodlands | |||||||||||||||||||||||||||||||||||||||||||||
Elevation | 300–2200 m (1000–7200 ft) | |||||||||||||||||||||||||||||||||||||||||||||
Distribution |
CA
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w North America; nw Mexico |
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Discussion | Lessingia tenuis is known from the central and southern San Francisco Bay area through the South Coast Range to Ventura County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 12 (12 in the flora). In gland-bearing lessingias, the glands may be stipitate and/or sessile (gland-dotted, sometimes in pits) and may be found on stems, leaves, and/or phyllaries. They are seldom restricted to the faces of leaves or phyllaries and are usually most prominent on leaf and/or phyllary margins. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 455. | FNA vol. 20, p. 452. | ||||||||||||||||||||||||||||||||||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Lessingia | Asteraceae > tribe Astereae | ||||||||||||||||||||||||||||||||||||||||||||
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Synonyms | L. ramulosa var. tenuis, L. germanorum var. parvula, L. germanorum var. tenuis | |||||||||||||||||||||||||||||||||||||||||||||
Name authority | (A. Gray) Coville: Contr. U.S. Natl. Herb. 4: 124. (1893) | Chamisso: Linnaea 4: 203, plate 2, fig. 2. (1829) | ||||||||||||||||||||||||||||||||||||||||||||
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