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Pityopsis flexuosa
(Nash) Small
Familia:
Asteraceae
Zigzag Silk-Grass
[
Heterotheca feuxuosa
(Nash) V. L. Harms]
FNA
Recursos
John C. Semple in Flora of North America (vol. 20)
Perennials,
20-50 cm; rhizomes 1-5 cm.
Stems
1-6, ascending, sometimes reddish brown, usually simple, flexuous, slender, moderately sericeous, glabrescent.
Leaves:
basal equaling or shorter than cauline, persistent through winter, withering by flowering; cauline spreading to ascending, sessile, blades linear-lanceolate, 30-70 × 3-7 mm, apices acute, faces moderately sericeous, glabrescent; distal slightly reduced.
Heads
3-20 per stem, in corymbiform arrays.
Peduncles
sparsely bracteolate, 1-11 cm, tomentose, sparsely, minutely glandular; bracteoles reduced distally.
Involucres
narrowly campanulate, (7-)8-11 mm (equaling pappi).
Phyllaries
in 4-6 series, margins hyaline, sometimes reddish distally, fimbriate (midnerves pronounced), apices acute, faces sparsely pilose, eglandular or sparsely, minutely stipitate-glandular.
Ray florets
9-13; laminae 5-8 mm.
Disc florets
25-45; corollas 5.5-7 mm, tubes and proximal throats sparsely puberulent, lobes 0.5 mm, glabrous or glabrate.
Cypselae
fusiform, 3-4 mm, ribbed (dark between ribs), faces sparsely strigose;
pappi:
outer of linear scales 0.3-1 mm, inner of 30-50 bristles 5.5-7 mm.
2
n
= 18.
Flowering late summer-fall. Sandy, open soils, open pine-oak woods, clearings; 0-50 m; Fla.
Pityopsis flexuosa
is known only from the vicinity of Tallahassee.
Abrir Mapa Interactivo
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
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