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Sibaropsis
Family:
Brassicaceae
Images
not available
FNA
Resources
Steve Boyd in Flora of North America (vol. 7)
Annuals;
not scapose; (often glaucous), usually glabrous, sometimes glabrate, trichomes minute, (proximalmost leaves with evanescent cilia).
Stems
erect, often branched basally.
Leaves
basal and cauline; sessile; blade (base not auriculate), not rosulate, margins entire.
Racemes
(corymbose, several-flowered, lax), considerably elongated in fruit.
Fruiting pedicels
usually ascending, rarely straight, slender.
Flowers:
sepals erect, lanceolate- to ovate-oblong, (subequal), lateral pair obscurely subsaccate basally; petals light purple- or pink-lavender (with darker purplish veins, adaxial pair slightly larger), spatulate, claw well-differentiated from blade, (apex slightly emarginate to obcordate); stamens in 3 unequal pairs, (adaxial pair sterile); filaments not dilated basally, (adaxial pair ± connate); anthers ovate-oblong, (not apiculate); nectar glands lateral, (minute), median glands absent.
Fruits
tardily dehiscent, sessile, linear, smooth, slightly latiseptate; valves each with obscure midvein, glabrate, (margins minutely scabrous); replum rounded; septum complete; ovules 24-44 per ovary; style distinct; stigma subentire.
Seeds
uniseriate, flattened, obscurely winged distally, oblong; seed coat not mucilaginous when wetted; cotyledons incumbent, (linear).
Sibaropsis
is unusual in Brassicaceae in that the inflorescence axis disarticulates distal to each pedicel and subtending axis internode, thus fruits are dispersed as individual units, except that the proximalmost fruits remain persistent.
Sibaropsis hammittii
Images
not available
Map not
Available