Alyssum desertorum Stapf
  • Denkschr. Kaiserl. Akad. Wiss., Wien. Math.-Naturwiss. Kl. 51: 33 (1886)


Cite taxon page as 'WFO (2023): Alyssum desertorum Stapf. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000529408. Accessed on: 05 Feb 2023'

General Information

Herbs annual, (2-)5-18(-28) cm tall, canescent throughout (except fruit) with appressed, sessile, 8-20-rayed stellate trichomes. Stems erect, ascending, or decumbent, often several from the base. Cauline leaves subsessile or lowermost attenuate to petiolelike base to 5 mm; leaf blade linear to oblanceolate-linear, (0.3-)0.5-2.5(-3) cm × (0.5-)1-3(-4) mm, gradually smaller upward, base attenuate, apex acute. Fruiting pedicels ascending or subdivaricate, (1-)1.5-3.5(-4.5) mm, stout, straight, covered with stellate trichomes only. Sepals oblong, 1.4-1.8(-2) × 0.4-0.5 mm, deciduous, stellate. Petals pale yellow, oblanceolate, 2-2.5 × 0.5-0.6 mm, sparsely stellate outside, caducous, base attenuate, apex obtuse or retuse. Filaments 1-1.8(-2) mm; median pairs gradually expanded from apex to narrowly winged base, not toothed; lateral pair with a broadly winged appendage apically notched into 2 teeth; anthers ovate, 0.1-0.2 mm. Ovules 2 per locule. Fruit orbicular, 2.5-4(-4.5) mm in diam., apex shallowly emarginate; valves not veined, uniformly inflated at middle, broadly flattened at margin, glabrous and often glaucous; style 0.3-0.7 mm, slender, glabrous. Seeds often 2 per locule, ovate, 1.2-1.5 × 0.9-1.1 mm, slightly compressed, margined or not. Fl. and fr. Apr-Jun. 2n = 32.

  • Provided by: [C].Flora of China @ efloras.org
    • Source: [
    • 1
    • ]. 

    Annuals; canescent throughout except fruit, trichomes appressed, 8-20-rayed. Stems simple or few to several from base, erect, ascending, or decumbent, (0.2-)0.5-1.8(-2.8) dm. Cauline leaves subsessile or (proximal) attenuate to petiole-like base (to 0.5 cm); blade linear to oblanceolate-linear, (0.3-)0.5-2.5(-3) cm × (0.5-)1-3(-4) mm (gradually smaller distally), base attenuate, apex acute. Fruiting pedicels ascending or subdivaricate, straight, stout, (1-)1.5-3.5(-4.5) mm, trichomes uniformly stellate. Flowers: sepals oblong, 1.4-1.8(-2) × 0.4-0.5 mm, stellate-pubescent; petals pale yellow, oblanceolate, 2-2.5 × 0.5-0.6 mm, base attenuate, apex obtuse or retuse, sparsely stellate-pubescent abaxially; filaments: median pairs not toothed, gradually expanded from apex to narrowly winged base, lateral pair with broadly winged appendage apically notched into 2 teeth, 1-1.8(-2) mm; anthers ovate, 0.1-0.2 mm. Fruits orbicular, 2.5-4(-4.5) mm diam., apex shallowly emarginate, usually glabrous; valves uniformly inflated at middle, broadly flattened at margins, often glaucous, rarely sparsely pubescent (when young); ovules 2 per ovary; style 0.3-0.7 mm, glabrous. Seeds ovoid, slightly compressed, 1.2-1.5 × 0.9-1.1 mm, margined or not. 2n = 32.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    Annual, 5-20 (-25) cm long, erect, spreading or ascending, branched mostly from the base, densely covered with stallate rough hairs. Leaves oblanceolate or linear-lanceolate, 10-30 mm long, 1-5 mm broad, sessile. Racemes 30-40-flowered, ebracteate, up to 10 cm long in fruit. Flowers c. 2 mm across, pale yellow or dull-whitish; pedicel up to 3 mm long in fruit, ascending or horizontal. Sepals c. 1.5 mm long. Petals c. 2.5 mm long, broadest in the middle, apex obscurely emarginate, sparsely hairy at the back, specially on the veins. Stamens c. 1.5:2 mm long; filaments of the outer two smaller stamens with scale-like, notched appendages. Siliculae 2.5-4 mm in diameter, ± orbicular; apex slightly emarginate; style usually c. 0.5 mm long; valves uniformly tumid with a flat narrow margin, glabrous; septum not veined; seeds 2 in each locule, c. 1.5 mm long, ovate-orbicular, very narrowly winged (margined), brown.

  • Provided by: [D].Flora of Pakistan
    • Source: [
    • 3
    • ]. 

     Information From

    Brassicaceae
    http://www.worldfloraonline.org/organisation/Brassicaceae
    World Flora Online Data. 2021.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    Flora of China @ efloras.org
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Missouri Botanical Garden
    Flora of Pakistan
    http://www.tropicos.org/Project/Pakistan
    Flora of Pakistan. Missouri Botanical Garden. Accessed on Jun. 2020.
    • D Missouri Botanical Garden
    World Flora Online Consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2017.
    • E CC0 1.0 Universal (CC0 1.0).