Difference between revisions of "Prenanthes autumnalis"
Fl. Carol., 193. 1788.
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|common_names=Slender rattlesnakeroot | |common_names=Slender rattlesnakeroot | ||
+ | |special_status={{Treatment/ID/Special_status | ||
+ | |code=E | ||
+ | |label=Endemic | ||
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|publication year=1788 | |publication year=1788 | ||
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− | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V19_363.xml |
|tribe=Asteraceae tribe Cichorieae | |tribe=Asteraceae tribe Cichorieae | ||
|genus=Prenanthes | |genus=Prenanthes |
Revision as of 21:37, 27 May 2020
Plants 40–140 cm; taproots thickened, tuberous. Stems 1–5, erect, mostly green with mottled purple, slender, simple, glabrous. Leaves: proximal present at flowering; petiolate (petioles winged); blades oblong to linear, 7–18 × 0.5–6 cm, coriaceous, bases attenuate, margins deeply pinnately lobed or divided, lobes narrow and at right angles, apices acute to acuminate, faces glabrous or slightly glabrate along veins; distally sessile and much reduced. Heads (1–2 in pedunculate lateral clusters) in spiciform or racemiform arrays. Involucres cylindro-campanulate, 10–13 × 3–4 mm. Calyculi of 6–8, green to purple, triangular to subulate bractlets 1–4 mm. Phyllaries 7–8, pink or purple, linear to elliptic, 8–13 mm, glabrous. Florets 8–10; corollas usually pinkish, sometimes lavender or white, 11–17 mm. Cypselae dark green, elliptic to linear, subterete to angular, 3.5–5.5 mm, indistinctly 8–10-ribbed; pappi pale yellow to tan, 5 mm.
Phenology: Flowering Aug–Oct.
Habitat: Coastal plain, low savannas, sandy pinelands, moist places, swales
Elevation: 0–200 m
Distribution
![V19-363-distribution-map.gif](/w/images/5/5c/V19-363-distribution-map.gif)
Del., Fla., Ga., Md., Miss., N.J., N.C., S.C., Va.
Discussion
Prenanthes autumnalis is recognized by its erect, slender habit, pinnately lobed proximal leaves, narrowly racemiform or spiciform arrays of heads, glabrous phyllaries, and usually pinkish corollas.
Selected References
None.