Flora of North America species comparison

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Centratherum

centratherum, larkdaisy
Habit Perennials (or functionally annuals), 1–3(–8+) dm (stems sometimes rooting at proximal nodes).
Leaves

cauline;

sessile or petiolate, petioles ± winged;

blades ovate to obovate, lanceolate, or linear, bases ± cuneate, margins toothed, apices acute, abaxial faces usually ± hirtellous to strigillose or tomentose, sometimes nearly glabrous, adaxial faces sparsely scabrellous or glabrate, both usually resin-gland-dotted.
Involucres

± hemispheric, 6–12(–18+) mm diam.
Florets

30–50(–100+);

corollas usually lavender to purplish (rarely white), tubes longer than funnelform throats, lobes 5, lance-linear, ± equal.
Phyllaries

24–50+ in 4–8+ series, each proximally firm, distally ± scarious, the outer ovate to deltate or lanceolate, inner oblong to lanceolate, margins entire, tips rounded to acute, usually apiculate to seta-tipped or attenuate-spinose, abaxial faces glabrous or sparsely strigillose to tomentose and usually ± resin-gland-dotted distally.
Heads

discoid (pedunculate, each subtended by 3–8+, ± foliaceous bracts), borne singly.
Cypselae

± columnar to plumply clavate, 8–10-ribbed, glabrous, often resin-gland-dotted;

pappi caducous, of 20–40 lance-linear to subulate scales.
x

= 16.

Centratherum
Distribution
from FNA
FL; Neotropics; Pacific Islands (Philippines); Australia
[BONAP county map]
Discussion

Species 2–4 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 206. Author: John L. Strother.
Parent taxa Asteraceae > tribe Vernonieae
Subordinate taxa
C. punctatum
Name authority Cassini: Bull. Sci. Soc. Philom. Paris 1817: 31. (1817): in F. Cuvier, Dict. Sci. Nat. ed. 2, 7: 383. (1817)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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