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Habit Annuals or biennials.
Stems

unbranched or branched distally, 2–7(–10) dm, glabrous or pubescent basally, trichomes branched, minute.

Basal leaves

often withered by anthesis.

Cauline leaves

blade lanceolate, narrowly oblong, or linear-lanceolate, pinnatifid or sinuate-dentate, (1.5–)2.5–7(–10) cm × 2–10(–20) mm, base sagittate or strongly auriculate, margins usually coarsely dentate to lobed, rarely entire, apex acute, surfaces glabrescent or sparsely pubescent, trichomes primarily forked.

Flowers

sepals 2–4.2 × 0.7–1.5 mm;

petals pale yellow, (3.5–)4–6.5 × 1.5–2 mm;

filaments 2–3.5 mm;

anthers ca. 0.5 mm.

Fruiting pedicels

ascending to divaricate, 15–30(–40) mm.

Fruits

depressed globose, 7–11 × (5.5–)6.5–8(–9) mm (almost as long as wide, or longer), apex subtruncate or, rarely, rounded;

valves each with prominent midvein, margin obscurely or narrowly winged;

style 1.2–2.5 mm.

Seeds

reddish or yellowish brown, (1.8–)2–3 × 0.7–1 mm.

2n

= 40.

Camelina alyssum

Phenology Flowering May–June.
Habitat Fields, roadsides, prairies
Distribution
from FNA
CA; CO; MT; ND; SD; WY; AB; MB; SK; Europe [Introduced in North America; introduced also in Australia]
[BONAP county map]
Discussion

As indicated by R. L. McGregor (1985), Camelina alyssum is known from the above states only from old collections, and, apparently, the species has not been collected again during the past five decades. Although we have not examined all of his cited specimens, those on which the Missouri and Nebraska records are based belong to C. sativa.

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

Source FNA vol. 7, p. 453.
Parent taxa Brassicaceae > tribe Camelineae > Camelina
Sibling taxa
C. microcarpa, C. rumelica, C. sativa
Synonyms Myagrum alyssum
Name authority (Miller) Thellung: Index Seminum (Zürich) 1906: 10. (1906)
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