Abutilon trisulcatum

(Jacquin) Urban

Repert. Spec. Nov. Regni Veg. 16: 32. 1919. 1919

Basionyms: Sida trisulcata Jacquin Enum. Syst. Pl., 26. 1760
Synonyms: Abutilon nealleyi J. M. Coulter A. ramosissimum C. Presl A. triquetrum Sweet
Treatment appears in FNA Volume 6. Treatment on page 227. Mentioned on page 220, 221.

Herbs, annual, sometimes perennial, or subshrubs, 1–2.5 m. Stems erect, prominently 3-sulcate when young, minutely puberulent, usually viscid (especially in inflorescence). Leaves: stipules subulate, 2–4 mm; petiole usually shorter than blade; blade slightly discolorous, ovate, 6–11 cm, longer than wide, base cordate, margins crenulate-serrulate, apex acuminate, surfaces tomentulose, obscured by pubescence. Inflorescences terminal, open panicles. Flowers: calyx 3–4 mm, lobes not overlapping, erect in fruit, lanceolate-ovate; corolla sometimes reflexed, yellow, often with dark red center, petals 4–6 mm; staminal column glabrous; style 5-branched. Schizocarps subcylindric, usually medially constricted, 6–8 × 5–8 mm; mericarps: apex apiculate, minutely puberulent. Seeds 3 per mericarp, 2 mm, minutely pubescent. 2n = 14.


Phenology: Flowering winter–spring.
Habitat: Dry shrublands, disturbed vegetation, roadsides
Elevation: 0–300 m

Distribution

Tex., Mexico, West Indies, Central America

Discussion

Abutilon trisulcatum occurs from Texas to Nicaragua and in the West Indies. It is a common roadside weed in most of Mexico, and has been found in southern Texas in Cameron and Hidalgo counties.

Selected References

None.

Lower Taxa

None.

... more about "Abutilon trisulcatum"
puberulent +
Paul A. Fryxell† +  and Steven R. Hill +
(Jacquin) Urban +
cordate +
Sida trisulcata +
discolorous +
longer than wide +
6 cm60 mm <br />0.06 m <br /> (11 cm110 mm <br />0.11 m <br />) +
not inflated +
not accrescent +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
indehiscent +  and loculicidal +
Tex. +, Mexico +, West Indies +  and Central America +
0–300 m +
sparse;copious +
pistillate +  and staminate +
unisexual +  and bisexual +
not setose +  and hairy +
cylindric +, cask--shaped +, oblate +, ovoid +, globose +  and not inflated +
Dry shrublands, disturbed vegetation, roadsides +
axillary +  and terminal +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
lanceolate-ovate +
crenulate-serrulate +
wedge--shaped +
3-40-carpellate +
adnate +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering winter–spring. +
Repert. Spec. Nov. Regni Veg. +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
subcylindric +
constricted +
scabridulous +
turbinate +
persistent +
sessile +  and subsessile +
exserted +  and included +
filiform +, linear +  and capitate +
1-2 times number of carpels +
obscured +  and tomentulose +
Abutilon nealleyi +, A. ramosissimum +  and A. triquetrum +
Abutilon trisulcatum +
Abutilon +
species +
perennial +  and annual +
subshrub +  and herb +
monoecious +, dioecious +  and hermaphroditic +
100 cm1,000 mm <br />1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +