Flora of North America species comparison

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Iodanthus

iodanthus
Habit Perennials; not scapose; glabrous or sparsely pubescent.
Stems

erect, branched distally.
Leaves

basal and cauline;

petiolate or sessile;

basal (withered by flowering), not rosulate, petiolate, blade margins lobed or not;

cauline petiolate (petioles winged) or sessile, blade (base auriculate), margins dentate, entire, or lyrately lobed.
Racemes

(lax), considerably elongated in fruit.
Flowers

sepals erect to ascending, oblong, lateral pair not or slightly saccate basally;

petals purple, pink, or white, spatulate, (longer than sepals), claw differentiated from blade;

stamens tetradynamous;

filaments not dilated basally;

anthers linear to narrowly oblong, (apiculate);

nectar glands: lateral annular, median glands confluent with lateral.
Fruiting pedicels

divaricate to ascending, slender or stout.
Fruits

siliques, sessile or shortly stipitate, linear, smooth, terete;

valves each with distinct midvein, glabrous;

replum rounded;

septum complete;

ovules 22–36 per ovary;

style distinct;

stigma capitate.
Seeds

uniseriate, plump, not winged, oblong;

seed coat (minutely reticulate), not mucilaginous when wetted;

cotyledons accumbent.

Iodanthus
Distribution
from USDA
c United States; e United States
[BONAP county map]
Discussion

Species 1.

R. C. Rollins (1993) recognized four species in Iodanthus, of which three are endemic to Mexico. As summarized by R. A. Price and I. A. Al-Shehbaz (2001), molecular data clearly support treatment of the genus as monospecific and closely allied to Cardamine, as well as recognition of the three Mexican species as members of Chaunanthus, a genus unrelated to Iodanthus and members of the Thelypodieae.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 484. Author: Ihsan A. Al-Shehbaz.
Parent taxa Brassicaceae > tribe Cardamineae
Subordinate taxa
I. pinnatifidus
Synonyms Cheiranthus unranked I.
Name authority (Torrey & A. Gray) Steudel: Nomencl. Bot. ed. 2, 1: 812. (1840)
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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