Flora of North America species comparison

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Hornungia

hornungia, horungia
Habit Annuals [perennials]; [caudex branched]; not scapose; glabrous or puberulent, trichomes minutely branched and subsessile, mixed with simple ones.
Stems

erect, ascending, or decumbent [procumbent], branched or, rarely, unbranched.
Leaves

basal and cauline [or cauline absent];

petiolate or subsessile;

basal rosulate or not, petiolate, blade margins entire, dentate, or pinnatisect;

cauline petiolate or subsessile, blade margins pinnatisect, pinnatifid, dentate, or entire.
Racemes

(corymbose), elongated or not in fruit.
Flowers

sepals spreading or reflexed, ovate [or oblong], (glabrous or puberulent);

petals white, spatulate, [obovate, oblong, or oblanceolate], (longer or shorter than sepals), claw absent, (apex obtuse or rounded);

stamens (rarely 4), subtetradynamous;

filaments often dilated basally;

anthers ovate, (apex obtuse);

nectar glands lateral, 1 on each side of lateral stamen, median glands present or absent.
Fruiting pedicels

divaricate, slender.
Fruits

silicles, sessile, oblong, elliptic, obovoid [ovoid, suborbicular, lanceoloid], keeled, angustiseptate;

valves each with prominent midvein, glabrous;

replum rounded;

septum complete;

ovules [4–]10–24 per ovary;

style usually obsolete (rarely to 0.5 mm);

stigma capitate.
Seeds

biseriate or aseriate, plump, not winged, oblong;

seed coat (obscurely reticulate) mucilaginous or not when wetted;

cotyledons incumbent, rarely accumbent.
x

= 6.

Hornungia
Distribution
from USDA
Europe; Asia; n Africa [Introduced in North America; introduced also in Mexico, South America, s Africa, Australia]
[BONAP county map]
Discussion

Species 3 (1 in the flora).

R. C. Rollins (1993) recognized Hutchinsia to include the more commonly used Hymenolobus. As shown by F. K. Meyer (1982), Hutchinsia is an illegitimate name because, when described, it included the type of the earlier published Iberis Linnaeus, and he suggested that the name be replaced by Pritzelago. O. Appel and I. A. Al-Shehbaz (1998) demonstrated that the differences separating Hymenolobus and Pritzelago from Hornungia are trivial, and they adopted the latter for the combined genus. Molecular data (K. Mummenhoff et al. 2001) clearly support the placement of these taxa in one genus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 530. Author: Ihsan A. Al-Shehbaz.
Parent taxa Brassicaceae > tribe Descurainieae
Subordinate taxa
H. procumbens
Synonyms Hutchinsia, Hutchinsiella, Hymenolobus, Microcardamum, Pritzelago
Name authority Reichenbach: in H. G. L. Reichenbach et al., Deutschl. Fl. 1: 33. (1837)
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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