Hornungia procumbens

(Linnaeus) Hayek
Repert. Spec. Nov. Regni Veg. Beih. 30: 480. 1925.
Basionym: Lepidium procumbens Linnaeus Sp. Pl. 2: 643. 1753
Synonyms: Capsella elliptica C. A. Meyer Capsella procumbens (Linnaeus) Fries Hutchinsia procumbens (Linnaeus) Desvaux Hymenolobus divaricatus Nuttall Hymenolobus erectus Nuttall Hymenolobus procumbens (Linnaeus) Nuttall Noccaea procumbens (Linnaeus) Reichenbach Thlaspi procumbens (Linnaeus) Wallroth
Treatment appears in FNA Volume 7. Treatment on page 530. Mentioned on page 531.

Plants glabrous throughout or puberulent, trichomes usually minutely forked, some simple. Stems (0.2–)0.5–2.2(–3) dm. Basal leaves: petiole (0.2–)0.5–1.2(–2) cm; blade obovate, oblanceolate, or oblong, (0.2–)1–2.5(–4) cm × (1–)5–11(–16) mm, base cuneate or attenuate, apex acute or obtuse. Cauline leaves (distal) subsessile; blade similar to basal (smaller distally). Racemes few- to several-flowered (rachis straight or slightly flexuous in fruit). Fruiting pedicels 3–8(–12) mm. Flowers: sepals 0.6–1.1 × 0.4–0.6 mm; petals 0.6–1.2 × 0.3–0.6 mm; filaments (white), 0.5–1 mm; anthers ca. 0.1 mm. Fruits (0.2–)0.3–0.4(–0.5) cm × (1–)1.4–2.2 mm, apex subtruncate to slightly emarginate. Seeds 0.5–0.6 × 0.3–0.4 mm. 2n = 12, 24.


Phenology: Flowering Feb–Jul.
Habitat: Deserts, meadows, shade of bushes, disturbed habitats, waste places, saline banks, salt marshes, sagebrush plains, alkaline flats, slopes
Elevation: 0-2600 m

Distribution

V7 839-distribution-map.gif

Introduced; B.C., Man., Nfld. and Labr. (Nfld.), Sask., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo., Europe, Asia, n Africa, introduced also in Mexico, South America, s Africa, Australia.

Discussion

Hornungia procumbens is highly variable, especially in fruit size and shape, number of seeds per fruit, indumentum, plant size, and shape and number of leaf divisions. Many of its morphological extremes were recognized at specific and infraspecific ranks, and more than 40 synonyms exist.

Selected References

None.

Lower Taxa

None.

... more about "Hornungia procumbens"
Ihsan A. Al-Shehbaz +
(Linnaeus) Hayek +
Lepidium procumbens +
B.C. +, Man. +, Nfld. and Labr. (Nfld.) +, Sask. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +, Wyo. +, Europe +, Asia +, n Africa +, introduced also in Mexico +, South America +, s Africa +  and Australia. +
0-2600 m +
Deserts, meadows, shade of bushes, disturbed habitats, waste places, saline banks, salt marshes, sagebrush plains, alkaline flats, slopes +
Flowering Feb–Jul. +
Repert. Spec. Nov. Regni Veg. Beih. +
Capsella elliptica +, Capsella procumbens +, Hutchinsia procumbens +, Hymenolobus divaricatus +, Hymenolobus erectus +, Hymenolobus procumbens +, Noccaea procumbens +  and Thlaspi procumbens +
Hornungia procumbens +
Hornungia +
species +