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Erigeron serpentinus
G.L. Nesom
No occurrences found
Family:
Asteraceae
serpentine erigeron
Images
not available
FNA
Resources
Guy L. Nesom in Flora of North America (vol. 20)
Perennials,
40-50 cm; taprooted, caudices simple.
Stems
erect (arising from crowns, without axillary leaf tufts), glabrous or glabrate, eglandular.
Leaves
mostly cauline; blades linear, 20-40 × 0.6-0.8 mm (mid and distal longer than internodes), barely reduced distally, margins entire, ascending-ciliate (cilia thin-based), faces glabrous, eglandular.
Heads
1 or 2-4 in loosely corymbiform arrays.
Involucres
4.5-5 × 9-12 mm.
Phyllaries
in 3-5 series (inner: margins narrowly scarious), glabrate (barely perceptible), densely and minutely glandular.
Ray florets
9-13; corollas white, drying blue, 7-8 mm, laminae weakly coiling.
Disc corollas
3.2-4 mm (throats slightly indurate, not inflated).
Cypselae
(mature size not observed), 2-nerved, faces sparsely strigose;
pappi:
outer of setae, inner of 26-32 bristles. Flowering May-Aug. Shrubby vegetation over serpentine; of conservation concern; 400-600 m; Calif.
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