Streptanthella

Rydberg

Fl. Rocky Mts., 364, 1062. 1917.

Etymology: Genus Streptanthus and Latin -ella, diminutive
Treatment appears in FNA Volume 7. Treatment on page 699. Mentioned on page 233, 244, 676.
 TaxonIllustrator 
FNA7 P87 Stanleya viridiflora.jpegStanleya viridiflora
Streptanthella longirostris
Streptanthus barbatus
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Annuals; not scapose; (often glaucous), glabrous throughout. Stems erect, usually branched distally, rarely unbranched. Leaves basal and cauline; petiolate or sessile; basal not rosulate, petiolate, blade similar to cauline; cauline petiolate or sessile, blade (base not auriculate), margins entire, dentate, sinuate, or pinnatifid. Racemes (corymbose, several-flowered, lax), considerably elongated in fruit. Fruiting pedicels usually reflexed, rarely divaricate, slender or stout. Flowers: sepals erect, oblong, (unequal), lateral pair subsaccate basally; petals white or yellow (often veins purplish), spatulate, (slightly exceeding sepals, margins crisp), claw well-differentiated from blade, (apex obtuse); stamens in 3 unequal pairs; filaments not dilated basally; anthers ovate to oblong, (apiculate); nectar glands lateral, semiannular, subtending lateral stamens, median glands absent. Fruits sessile, linear, smooth, latiseptate; valves each with prominent midvein; replum rounded or slightly flattened; septum complete; ovules (12–) 16–28 (–34); style distinct, (well-developed, adnate with valves and replum apex); stigma subentire. Seeds uniseriate, flattened, winged, oblong; seed-coat not mucilaginous when wetted; cotyledons incumbent. x = 7.

Distribution

w United States, nw Mexico

Discussion

Species 1.

Selected References

None.

"elongated" is not a number."thick" is not a number.

... more about "Streptanthella"
ovate +  and oblong +
Ihsan A. Al-Shehbaz +
Rydberg +
appendaged +  and unappendaged +
not +  and auriculate +
dissected +, repand +, sinuate +, crenate +  and dentate +
much smaller +  and reduced +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
w United States +  and nw Mexico +
straight +  and curved +
Genus Streptanthus and Latin -ella, diminutive +
not winged +  and unappendaged +
connate +  and distinct +
zygomorphic +  and actinomorphic +
latiseptate +  and sessile +
4-angled +  and terete +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid;sinuate;pinnatifid;sinuate;dentate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
unequal +
yellow +  and white +
rudimentary +
spatulate +
trinucleate +  and 3(-11)-colpate +
Fl. Rocky Mts., +
stout +  and slender +
flattened +  and rounded +
mucilaginous +
aseriate +, uniseriate +  and biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
oblong +  and flattened +
not basally +  and saccate +
persistent +  and caducous +
distinct +
subsaccate +  and oblong +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
unbranched +  and branched +
procumbent +  and decumbent +
subentire +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
Cruciferae +
Streptanthella +
Brassicaceae tribe Thelypodieae +
dendritic +  and simple +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
perennial +, biennial +  and annual +
subshrub +  and shrub +
aquatics +  and terrestrial +
glabrous +  and pubescent +