Thelesperma Lessing (Q2584)
Thelesperma is a taxon with the rank genus within the tribe Coreopsideae
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Thelesperma Lessing
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Thelesperma is a taxon with the rank genus within the tribe Coreopsideae
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Statements
taxon/id/Thelesperma Lessing
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Thelesperma Lessing
Thelesperma
Lessing
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 21: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford University Press, New York.
accepted
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Annuals, perennials, or subshrubs, 10–70+ cm.
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Stems usually 1, erect, branched distally or ± throughout.
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Leaves mostly basal, basal and cauline, or mostly cauline;
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mostly opposite (distal rarely alternate);
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blades usually 1 (–3) -pinnately lobed (ultimate lobes oblanceolate to filiform), faces usually glabrous, rarely hairy.
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Heads radiate or discoid, borne singly or in loose, corymbiform arrays.
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Calyculi of 3–8+ distinct, usually spreading or reflexed, usually linear to subulate, herbaceous bractlets.
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Involucres hemispheric to urceolate, 4–15+ mm diam.
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Phyllaries 5–8 in ± 2 series, persistent, connate 1/5–7/8+ their lengths, lanceovate to ovate, ± equal, ± leathery to membranous, margins (of distinct apices) scarious.
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Receptacles flat to convex, paleate;
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paleae falling, (whitish with redbrown striae, each ± appressed to abaxial face of subtended cypsela), obovate to oblong, scarious.
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Ray-florets 0 or ca. 8, neuter;
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corollas yellow or redbrown, or bicolored (yellow and redbrown).
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Disc-florets 20–100+, bisexual, fertile;
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corollas yellow (with redbrown nerves) or redbrown, either with throats equal to or longer than 5, ± deltate, ± equal lobes, or with throats shorter than 5, ± lance-linear, ± unequal lobes (in either form, the abaxial sinus usually ± deeper than others).
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Cypselae (dark redbrown or stramineous) outer often arcuate, shorter, inner more columnar, usually some or all ± obcompressed (each usually shed together with its subtending palea), faces smooth or papillate to tuberculate or verrucate, margins sometimes ± winged;
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pappi 0, or persistent, of 2 retrorsely ciliate, subulate scales or awns.
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branched
distally; distally; more or less throughout; throughout
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usually 1(-3)-pinnately
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obcompressed
usually; more or less
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papillate
tuberculate or verrucate
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in loose , corymbiform arrays
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