Isatis

Linnaeus

Sp. Pl. 2: 670. 1753.

,

Gen. Pl. ed. 5, 301. 1754.

Common names: Woad
Etymology: Greek isatis, name used for a dye plant, most likely woad
Treatment appears in FNA Volume 7. Treatment on page 567. Mentioned on page 230, 239, 244.
Revision as of 11:33, 30 July 2020 by imported>Volume Importer
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 TaxonIllustrator 
FNA7 P70 Teesdalia nudicaulis.jpegTeesdalia nudicaulis
Idahoa scapigera
Isatis tinctoria
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Barbara Alongi

Biennials [annuals, perennials]; not scapose; (often glaucous), glabrous or pubescent. Stems erect, often unbranched basally, paniculately branched distally. Leaves basal and cauline; petiolate or sessile; basal rosulate [or not rosulate], petiolate [rarely sessile], blade margins entire, repand, or dentate [rarely pinnately lobed]; cauline blade (base auriculate, sagittate, [or amplexicaul, rarely attenuate]), margins entire [dentate]. Racemes (corymbose, in panicles, several-flowered), considerably elongated in fruit. Fruiting pedicels reflexed, slender, (filiform, often thickened and clavate apically). Flowers: sepals erect or ascending, oblong [ovate]; petals oblanceolate [obovate, spatulate, or oblong], (equal to or longer than sepals), claw absent, (apex obtuse [subemarginate]); stamens slightly tetradynamous; filaments not dilated basally; anthers oblong [ovate], (apex obtuse or apiculate); nectar glands (6) confluent, or (4) lateral and median. Fruits siliques or silicles (samaroid), sessile, oblong, oblanceolate, elliptic, or obovate [ovate, cordate, spatulate, orbicular], 1- (or 2-) seeded, smooth, strongly angustiseptate, (prominently winged all around or distally; seed-bearing locule papery or corky, distinctly or obscurely 1–3-veined, sometimes keeled or shortly winged), glabrous or pubescent; valves and replum united; septum absent; ovules 1 (or 2) per ovary, (subapical); stigma capitate. Seeds plump, not winged, narrowly oblong; seed-coat (smooth), not mucilaginous when wetted; cotyledons incumbent or accumbent.

Distribution

Introduced; Europe, c, sw Asia, n Africa, also in South America (Chile), also in South America (Peru)

Discussion

Species 50 (1 in the flora).

Selected References

None.

Lower Taxa

"elongated" is not a number."thick" is not a number.

... more about "Isatis"
Ihsan A. Al-Shehbaz +
Linnaeus +
appendaged +  and unappendaged +
dentate +, repand +  and entire +
much smaller +  and reduced +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
not +  and differentiated +
emarginate +  and entire +
accumbent +  and incumbent +
Europe +, c +, sw Asia +, n Africa +, also in South America (Chile) +  and also in South America (Peru) +
straight +  and curved +
Greek isatis, name used for a dye plant, most likely woad +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
1-seeded +  and sessile +
indehiscent +
pubescent +  and glabrous +
angustiseptate +, obovate +, elliptic +, oblanceolate +  and oblong +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
median +  and lateral +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
rudimentary +
oblanceolate +
trinucleate +  and 3(-11)-colpate +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
slender +
flattened +  and rounded +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
saccate +  and not saccate +
persistent +  and caducous +
distinct +
ascending +  and erect +
perforated +  and complete +
reduced +
1-seeded +  and sessile +
pubescent +  and glabrous +
angustiseptate +, obovate +, elliptic +, oblanceolate +  and oblong +
1-seeded +  and sessile +
pubescent +  and glabrous +
angustiseptate +, obovate +, elliptic +, oblanceolate +  and oblong +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
Cruciferae +
Brassicaceae tribe Isatideae +
scale-like +  and forked +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
pubescent +  and glabrous +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +