Malachra urens

Poiteau ex Ledebour & Alderstam

Diss. Bot. Pl. Doming., 22. 1805.

Synonyms: Urena urens (Poiteau ex Ledebour & Alderstam) M. Gómez
Treatment appears in FNA Volume 6. Treatment on page 279.

Plants 0.5–1 m. Stems hispid with long, simple hairs and with longitudinal lines of minute hairs. Leaves: stipules 7–15 mm; petiole 1/2+ as long as blade; blade broadly ovate to weakly 3-lobed, 3–12 cm, apex acute to obtuse, surfaces hispid. Racemes short-pedunculate; peduncle shorter than corresponding petiole; boatshaped floral bracts sessile, without markings, ovate, margins entire, hispid. Flowers: calyx 3–5 mm; petals 7–11 mm. Mericarps 3 mm, smooth with reticulate veins, minutely puberulent to pubescent.


Phenology: Flowering year-round.
Habitat: Disturbed vegetation, savannas, secondary vegetation, often in poorly drained soil
Elevation: 0–500 m

Distribution

V6 510-distribution-map.jpg

Fla., West Indies (Cuba), West Indies (Puerto Rico)

Discussion

The name Malachra fasciata Jacquin is sometimes misapplied to M. urens, but the former is white-flowered rather than yellow-flowered, and differs in other characters, as noted by F. Areces B. and P. A. Fryxell (2007).

Selected References

None.

Lower Taxa

None.
... more about "Malachra urens"
acute;obtuse +
Paul A. Fryxell† +  and Steven R. Hill +
Poiteau ex Ledebour & Alderstam +
truncate +  and rounded +
asymmetric +  and symmetric +
broadly ovate +  and weakly 3-lobed +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
subsessile +, sessile +  and veined +
boat-shaped +
divided +  and not inflated +
not accrescent +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
indehiscent +  and loculicidal +
Fla. +, West Indies (Cuba) +  and West Indies (Puerto Rico) +
0–500 m +
sparse;copious +
pistillate +  and staminate +
unisexual +  and bisexual +
puberulent +  and glabrous +
oblate +  and not inflated +
Disturbed vegetation, savannas, secondary vegetation, often in poorly drained soil +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
lanceolate-ovate +
serrate;crenate +
minutely puberulent +  and pubescent +
wedge--shaped +
3 cm30 mm <br />0.03 m <br /> (?) +
3-40-carpellate +
(1-)2-many +
adnate +  and distinct +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Flowering year-round. +
Diss. Bot. Pl. Doming., +
short-pedunculate +
headlike +
reniform +
persistent +
sessile +  and subsessile +
not viscid +
filiform +, linear +  and capitate +
1-2 times number of carpels +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Urena urens +
Malachra urens +
Malachra +
species +
perennial +  and annual +
monoecious +, dioecious +  and hermaphroditic +