Flora of North America species comparison

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Wissadula

Wissadula parvifolia

wissadula
Habit Subshrubs [perennial herbs]. Plants branched, 1 m. Stems slender, minutely and obscurely stellate-hairy.
Stems

usually erect, hairy [glabrate], not viscid.

Leaves

distalmost sometimes subsessile;

stipules usually persistent, filiform, subulate, or minute;

blade broadly ovate to ovate-triangular [narrowly triangular], unlobed, base cordate, margins entire [crenate-dentate], surfaces usually stellate-hairy [sometimes glabrate].

stipules minute;

petiole 1–1.5(–2) cm, to 1/3 times blade length, minutely and obscurely stellate-hairy;

blade discolorous, ovate, 2.5–3.5 cm, base ± cordate, margins ± straight, apex acute to subobtuse.
Inflorescences

terminal panicles or racemes;

involucel absent.

open racemes or panicles, ebracteate.
Pedicels

2–3 cm.
Flowers

calyx not accrescent, not inflated, shorter than mature fruits, lobes not ribbed, triangular;

corolla usually yellowish, sometimes white, rotate;

staminal column exserted;

style 3–6-branched;

stigmas capitate.

calyx ca. 1/2-divided, 3–5 mm;

petals yellow, fading to orange, 5 mm.
Fruits

schizocarps, erect, not inflated, obovoid, not indurate;

mericarps 3–6, 2-celled, apex bulbous-apiculate, proximal cell indehiscent, distal cell dehiscent.

Seeds

(1–)3 per mericarp, lower cell 1-seeded, upper cell usually 2-seeded, hairy, proximal seed relatively more densely hairy.

2.5 mm, minutely hairy.
Schizocarps

minutely and obscurely hairy;

mericarps 5, 7–9 mm.
x

= 7.

Wissadula

Wissadula parvifolia
Phenology Flowering summer.
Habitat Roadsides, disturbed sites
Elevation 100 m (300 ft)
Distribution
from USDA
sc United States; Mexico; South America; West Indies; s Asia; Africa
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

Species 25 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

Wissadula parvifolia is found only in Hidalgo County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Leaf blades 2.5–3.5 cm, apex acute to subobtuse; stipules minute; petals yellow, fading to orange.
W. parvifolia
1. Leaf blades 4–11 cm, apex acute or acuminate; stipules 4–12 mm; petals usually yellowish or white, sometimes with dark red basal spot
→ 2
2. Leaf blades broadly ovate, base deeply cordate (except uppermost), margins curved; petals yellowish; stipules 7–12 mm.
W. hernandioides
2. Leaf blades ovate-triangular, base shallowly cordate, margins straight; petals yellowish or white, sometimes with dark red basal spot; stipules 4–5 mm.
W. periplocifolia
Source FNA vol. 6, p. 374. Authors: Paul A. Fryxell†, Steven R. Hill. FNA vol. 6, p. 375.
Parent taxa Malvaceae > subfam. Malvoideae Malvaceae > subfam. Malvoideae > Wissadula
Sibling taxa
W. hernandioides, W. periplocifolia
Subordinate taxa
W. hernandioides, W. parvifolia, W. periplocifolia
Name authority Medikus: Malvenfam., 24. (1787) Fryxell: Lundellia 10: 3, fig. 2. (2007)
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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