Difference between revisions of "Tropidocarpum"
Icon. Pl. 1: plate 43. 1836.
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|authority=Al-Shehbaz | |authority=Al-Shehbaz | ||
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|hierarchy=Brassicaceae;Brassicaceae tribe Descurainieae;Tropidocarpum | |hierarchy=Brassicaceae;Brassicaceae tribe Descurainieae;Tropidocarpum | ||
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|tribe=Brassicaceae tribe Descurainieae | |tribe=Brassicaceae tribe Descurainieae | ||
|genus=Tropidocarpum | |genus=Tropidocarpum | ||
Latest revision as of 22:36, 5 November 2020
Annuals; not scapose; pubescent or glabrous, trichomes simple, these mixed with smaller, short-stalked, Y-shaped, forked ones, rarely rays branched. Stems (usually several from base, rarely simple), usually ascending, decumbent, or prostrate, rarely erect, unbranched or branched [basally] distally, (slender). Leaves basal and cauline; petiolate or sessile; basal (withered by fruiting), not rosulate, petiolate, blade margins pinnatifid or pinnatisect; cauline sessile or subsessile, blade margins pinnatifid. Racemes (several-flowered, bracteate throughout), considerably elongated in fruit. Fruiting pedicels erect, ascending, or divaricate, slender. Flowers: sepals erect to ascending, oblong, (glabrous or pubescent); petals yellow, sometimes with purple tinge, oblanceolate, obovate, or spatulate, (slightly longer than sepals), claw undifferentiated from blade; stamens slightly tetradynamous; filaments sometimes slightly dilated basally; anthers ovate, (apex obtuse); nectar glands confluent, subtending bases of stamens. Fruits siliques or silicles, sessile, linear, oblong, or obdeltoid, smooth, strongly angustiseptate; valves [(2 or) 4 in T. capparideum, keeled], not veined, (thin-leathery throughout, or distally subwoody or thick-leathery and tuberculate-rugose), pubescent; replum rounded; septum complete or absent; ovules 4–70 per ovary; style distinct, (slender); stigma capitate. Seeds uniseriate or (in 4-valved fruits) 4-seriate, not winged, oblong; seed coat (reticulate), mucilaginous when wetted; cotyledons incumbent. x = 8.
Distribution
Calif., c Mexico, South America (c Chile).
Discussion
Species 4 (3 in the flora).
Tropidocarpum lanatum (Barnéoud) Al-Shehbaz & R. A. Price is known from central Chile.
Selected References
Key
| 1 | Fruits obdeltoid, valves thick-leathery and tuberculate-rugose distally, puberulent, trichomes antrorse; ovules 4-8 per ovary. | Tropidocarpum californicum |
| 1 | Fruits linear or oblong, valves thin-leathery and smooth distally, usually pubescent or puberulent, rarely glabrescent, trichomes retrorse; ovules 25-70 per ovary | > 2 |
| 2 | Fruits narrowly linear, (25-)30-60(-70) × 1.5-2(-3) mm, length 13-46 times width; valves 2. | Tropidocarpum gracile |
| 2 | Fruits oblong, (5-)9-20 × (3-)4-5 mm, length (1.6-)2.8-5 times width; valves (2 or) 4. | Tropidocarpum capparideum |