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Sisymbrieae DC. Search in IPNISearch in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Mémoires du Muséum d'Histoire Naturelle 7(1): 237. 1821. (20 Apr 1821) (Mém. Mus. Hist. Nat.) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: Represented by 14 genera and c. 40 species in our area.

 

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Lateral nectar glands semiannular or annular, open towards the inner side, rarely in pairs or short; middle glands often joining the laterals, torose and ± thickened in the middle, rarely short, conical and not joining the laterals. Hairs simple or branched, sometimes absent, often rigid and ciliate, rarely glandular. Sepals erect or suberect, Stamen filaments not appendaged but sometimes broad at base; anthers usually oblong, obtuse. Stigma depressed capitate, often sub-bilobed. Fruits usually long (siliquae) rarely short (siliculae) ; valves often somewhat convex and rigid; style mostly short, rarely absent; stigma mostly broad, obscurely to sub-bilobed; septum usually complete, rarely perforated or absent,with or without a vein, rarely 2-4-veined; seeds usually oblong or suborbicular, rarely winged; mucilaginous or not when wet; radicle mostly incumbent.
 

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1 Leaves bipinnate (2)
+ Leaves simple to lyrate-pinnatifed (5)
2 (1) Perennial, caespitose herbs; fruits siliculae Smelowskia
+ Annual or biennial herbs; fruits siliquae (3)
3 (2) Pedicels very short, inconspicuous, thick; siliquae subangular, conical-tapering above Robeschia
+ Pedicels conspicuous, often long, thin; fruits uniformly broad (4)
4 (3) Fruits less than 12 mm long , narrowly ellipsoid often slightly narrowed below, usually straight Sophiopsis
+ Fruits more than 12 mm long, linear, subcylin- drical, often upcurved Descurainia
5 (1) Basal leaves ovate-cordate; seeds longitudinally striated, large Alliaria
+ Basal leaves not so cordate; seeds not longitudinally striated, small (6)
6 (5) Fruit short, siliculae (rarely dub-siliquae type) (7)
+ Fruits often long, siliquae (rarely sub-siliculae type) (9)
7 (6) Cauline leaves amplexicaul, often ± sagittate Camelina
+ Cauline leaves linear to oblabceolate, not amplexicaul (8)
8 (7) Cauline leaves several; racemes lax, mostly bracteate Aphragmus
+ Cauline leaves 0-2 only; racemes often compact, ebracteate Braya
9 (6) Radical leaves much larger than the cauline leaves, about as long as the aerial stem; seeds 2-seriate Arcyosperma
+ Aerial stem usually much longer than the radical Leaves, seeds 1-seriate (10)
10 (9) Plants tender, lax with filiform stem; leaves 3-lobed to entire; fruits short, 1-locular, 3-6-seeded Lignariella
+ Plants erect to ascending, often robust; leaves not so lobed; fruits often long, 2-locular, many seeded (11)
11 (10) Flowers yellow (in our species); lateral nectar glands hexagonal-quadrate; valves ± 3- veined Sisymbrium
+ Flowers white, pinkish or violet (yellow in Arabidopsis pumila only) lateral nectar glands not angular; valves 1-veined (12)
12 (11) Middle nectar glands absent Torularia
+ Middle nectar glands present, ± torose, often joining the laterals (13)
13 (12) Seeds usually mucilaginous when wet Arabidopsis
+ Seeds not mucilaginous when wet Microsisymbrium
 
 
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