Pityopsis falcata |
Pityopsis flexuosa |
|
---|---|---|
sickle-leaf golden-aster, sickle-leaf silk-grass |
zigzag silkgrass |
|
Habit | Perennials, (10–)20–30(–40) cm; rhizomes 0.5–5 cm. | Perennials, 20–50 cm; rhizomes 1–5 cm. |
Stems | erect, sometimes reddish brown, sometimes branched distally, striate, sparsely to densely long-sericeous. |
1–6, ascending, sometimes reddish brown, usually simple, flexuous, slender, moderately sericeous, glabrescent. |
Leaves | basal usually withering by flowering, shorter than cauline; cauline spreading to ascending, sessile, blades linear, falcate, often conduplicate, apices acuminate; proximal 50–90 × 2–7 mm, glabrate to sparsely sericeous; distal somewhat smaller, glabrate except for margins. |
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. |
Peduncles | sparsely bracteolate, 1–4 cm, white-villous. |
sparsely bracteolate, 1–11 cm, tomentose, sparsely, minutely glandular; bracteoles reduced distally. |
Involucres | turbino-campanulate, 5–8 mm. |
narrowly campanulate, (7–)8–11 mm (equaling pappi). |
Ray florets | 9–15; corolla laminae 5–8 mm. |
9–13; laminae 5–8 mm. |
Disc florets | 30–60; corollas 4.5–6 mm, sparsely pilose near base of limbs, lobes 0.5 mm, sparsely pilose. |
25–45; corollas 5.5–7 mm, tubes and proximal throats sparsely puberulent, lobes 0.5 mm, glabrous or glabrate. |
Phyllaries | in 5–6 series, apices with tufts of hairs, faces sparsely strigose. |
in 4–6 series, margins hyaline, sometimes reddish distally, fimbriate (midnerves pronounced), apices acute, faces sparsely pilose, eglandular or sparsely, minutely stipitate-glandular. |
Heads | (2–)4–10(–25) in corymbiform arrays. |
3–20 per stem, in corymbiform arrays. |
Cypselae | fusiform, 3–4 mm, ribbed, faces strigose; pappi: outer of linear setiform scales 0.5–1 mm, inner of 30–40 bristles 4–6 mm. |
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. |
2n | = 18. |
= 18. |
Pityopsis falcata |
Pityopsis flexuosa |
|
Phenology | Flowering summer–fall. | Flowering late summer–fall. |
Habitat | Open areas on sandy glacial deposits, often in pine barrens (Pinus rigida) | Sandy, open soils, open pine-oak woods, clearings |
Elevation | 10–100 m (0–300 ft) | 0–50 m (0–200 ft) |
Distribution |
CT; FL; MA; NJ; NY; RI
|
FL |
Discussion | Pityopsis falcata grows on deposits left along the front of the Wisconsin Glaciation. It can be locally abundant in open sandy soils. It was collected once along railroad tracks west of Toronto, Ontario, and also along a beach in St. Petersburg, Florida, in 1955. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pityopsis flexuosa is known only from the vicinity of Tallahassee. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 223. | FNA vol. 20, p. 224. |
Parent taxa | Asteraceae > tribe Astereae > Pityopsis | Asteraceae > tribe Astereae > Pityopsis |
Sibling taxa | ||
Synonyms | Inula falcata, Chrysopsis falcata, Heterotheca falcata, Inula mariana var. ×falcata | Chrysopsis flexuosa, Heterotheca flexuosa |
Name authority | (Pursh) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 318. (1840) | (Nash) Small: Man. S.E. Fl., 1341. (1933) |
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