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Microthlaspi
Family:
Brassicaceae
Richard Hull
FNA
Resources
Ihsan A. Al-Shehbaz in Flora of North America (vol. 7)
Annuals;
not scapose; (glaucous).
Stems
erect or subdecumbent, unbranched or branched.
Leaves
basal and cauline; petiolate, sessile, or subsessile; basal (withered by fruiting), loosely rosulate or not; petiolate [subsessile], blade margins entire or obscurely dentate; cauline blade (base cordate to amplexicaul), margins entire or repand.
Racemes
(several-flowered), considerably elongated in fruit.
Fruiting pedicels
divaricate, straight or recurved, slender.
Flowers:
sepals ovate or oblong, (margins membranous); petals white, oblong or spatulate, (sometimes slightly unequal), claw (short or) undifferentiated from blade, (apex rounded [obtuse]); stamens slightly tetradynamous; filaments not dilated basally; anthers ovate, (apex obtuse); nectar glands (2 or 4), lateral, 1 on each side of lateral stamen (when 4).
Fruits
sessile, usually obcordate, rarely obovate, (apex emarginate), strongly angustiseptate; valves keeled, (winged around, much wider apically); replum rounded; septum complete, (not veined); ovules (4-)6-8(-10) per ovary; style obsolete or distinct, (included in apical notch of fruit); stigma capitate.
Seeds
plump, not winged, ovoid; seed coat (smooth), mucilaginous when wetted; cotyledons accumbent.
x
= 7.
Species within checklist:
A Floristic Checklist of Shenandoah River State Park, Warren County, Virginia
Microthlaspi erraticum
Images
not available
Map not
Available
Microthlaspi perfoliatum
Map not
Available
This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].
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