Sicyosperma gracile

A. Gray

Smithsonian Contr. Knowl. 5(6): 62. 1853.

Illustrated
Treatment appears in FNA Volume 6. Treatment on page 28.

Leaf-blades 2–7 cm wide, lobe apex rounded to acute. Inflorescences: each flower loosely enclosed within 2 bracts; peduncle hispid, hairs retrorsely curved. Flowers: petals apically 2-fid, corolla 2–3 mm diam. Pepos 4–5 mm, loosely enclosed by persistent bracts.


Phenology: Flowering Aug–Oct(–Nov).
Habitat: North slopes, cliff bases, canyon bottoms, stream sides, riparian scrub, willow-ash, cottonwood-willow, hackberry-acacia, oak woodlands
Elevation: 1000–1700 m

Distribution

V6 42-distribution-map.jpg

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Sonora)

Discussion

Sicyosperma gracile is recognized by its annual duration, minute salverform corollas with white, apically bifid petals, each flower enclosed within a pair of basally cordate bracts, and relatively small, 1-seeded, dry, indehiscent, unarmed pepos loosely enclosed by bracts. Specimens sometimes show only staminate inflorescences, but apparently this is an artifact of collection rather than an indication that the plant is unisexual.

Selected References

None.

Lower Taxa

None.
... more about "Sicyosperma gracile"
distinct +  and connate +
Guy L. Nesom +
A. Gray +
usually shallowly palmately 3(-5)-lobed;hastate +
persistent +
tubular +, saucer--shaped +, campanulate +  and rotate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
salverform +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +  and Mexico (Sonora) +
1000–1700 m +
furrowed +  and echinate +
dehiscent +  and indehiscent +
bristly +, smooth +, hairy +  and glabrous +
tuberculate +  and muricate +
fleshy +  and hard +
pistillate +  and staminate +
North slopes, cliff bases, canyon bottoms, stream sides, riparian scrub, willow-ash, cottonwood-willow, hackberry-acacia, oak woodlands +
perennial +
dioecious +  and monoecious +
umbellate;subumbellate +
solitary +, corymbose +, fasciculate +, racemose +  and paniculate +
irregularly sinuate-dentate;incised +
petiolate +, estipulate +  and simple +
triangular;deltate +
denticulate +  and entire +
not differentiated +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
induplicate-valvate +  and imbricate +
stipitate-glandular +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Flowering Aug–Oct(–Nov). +
Smithsonian Contr. Knowl. +
not arillate +
compressed +  and ovoid +
filiform-subulate +
Illustrated +
climbing +  and procumbent +
sprawling +  and prostrate +
puberulent;glabrous +
columnar +
Sicyosperma gracile +
Sicyosperma +
species +
plant +  and climbing +