Flora of North America species comparison

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Sibaropsis

sibaropsis
Habit 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.
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.
Fruiting pedicels

usually ascending, rarely straight, slender.
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
Distribution
from FNA
CA
[BONAP county map]
Discussion

Species 1.

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 694. Author: Steve Boyd.
Parent taxa Brassicaceae > tribe Thelypodieae
Subordinate taxa
S. hammittii
Name authority S. Boyd & T. S. Ross: Madroño 44: 30, figs. 2–4. (1997)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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