Flora of North America species comparison

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Guardiola

guardiola
Habit Perennials or subshrubs, (10–)30–100 cm.
Stems

mostly erect, branched.
Leaves

cauline; opposite; ± petiolate;

blades deltate or rounded-deltate to ovate [lanceolate to linear], margins usually dentate, faces glabrous or glabrate.
Involucres

narrowly cylindric [campanulate], 2–3[–6] mm diam.
Receptacles

convex, paleate (paleae similar to phyllaries, membranous, each enfolding a floret).
Ray florets

1–5, pistillate, fertile;

corollas whitish (tubes often longer than laminae).
Disc florets

3–20+, functionally staminate;

corollas whitish, tubes longer than abruptly ampliate, campanulate to funnelform throats, lobes 5, lanceolate to lance-linear (filaments hairy; anthers green).
Phyllaries

persistent, 3–5 in 1 series (distinct, oblong or lanceolate to linear, herbaceous, conduplicate, streaked with 8–12+ translucent nerves, margins often membranous).
Heads

radiate, in corymbiform arrays [borne singly].
Cypselae

± ellipsoid [fusiform to clavate], ± obcompressed, smooth or fine-ribbed, glabrous (bases carunculate);

pappi 0 [5–6, erose scales].
x

= 12.

Guardiola
Distribution
from USDA
sw United States; Mexico
[BONAP county map]
Discussion

Species ca. 10 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 42. Author: John L. Strother.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Guardiolinae
Subordinate taxa
G. platyphylla
Name authority Cervantes ex Bonpland: in A. von Humboldt and A. J. Bonpland, Pl. Aequinoct. 1: 143, plate 41. (1807)
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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