Tonestus eximius A.Nelson & J.F.Macbr.

Lake tahoe serpentweed (en)

Species

Angiosperms > Asterales > Asteraceae > Tonestus

Characteristics

Perennials, cespitose, 5–13 cm ; with branched caudices surmounting ± well-developed taproots, or short rhizomes. Stems (clothed with marcescent leaf bases) glabrous, densely stipitate-glandular. Leaves: basal blades broadly spatulate, 20–35 × 12–15 mm, margins coarsely, irregularly serrate to dentate; cauline blades oblong, 9–52 × 5–15 mm, ± reduced distally, margins coarsely, irregularly serrate or nearly entire; 1-or 3-nerved, margins stipitate-glandular, faces glabrous, stipitate-glandular. Heads usually borne singly, sometimes 2–4. Peduncles 2 –15 mm. Involucres broadly campanulate, 9–16(–20) × 5–11(–15) mm. Phyllaries 16–32 in 3–4 series, 1-or weakly 3-nerved, ± equal, margins eciliate; outer and mid green, oblong, 6–10 × 2–5 mm, foliaceous, apices rounded or obtuse to acute; inner green or sometimes anthocyanic, linear, 7–9 × 0.5–2 mm, chartaceous proximally, margins scarious, fimbriate and/or stipitate-glandular distally, apices acute to acuminate, often reflexed, faces stipitate-glandular distally. Ray florets 10–13; laminae elliptic, 5–8 × 1–3 mm. Disc florets 41–49; corollas narrowly funnelform, 5.5–7.5(–8.2) mm, exceeding involucres, lobes erect, 0.7–1.7 mm, 1 / 10 – 1 / 5 corolla length; anthers 2.5–3.3 mm; style-branch appendages subulate, 0.9–1.3 mm, stigmatic lines 0.9–1.6 mm. Cypselae linear, 2.5–6 mm, 5–9-nerved, faces villous, often ± viscid; pappus bristles 19–43, brittle. 2n = 18.
Life form perennial
Growth form herb
Growth support free-standing
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Sexuality hermaphrodite
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Root system rhizome tap-root
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Environment

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Usage

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Edible -
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Cultivation

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Distribution

Tonestus eximius world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:255044-2
WFO ID wfo-0000013024
COL ID 7CH7P
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Tonestus eximius Haplopappus eximius Haplopappus eximius subsp. eximius