Cyclanthera stenura

G. L. Nesom

Phytoneuron 2014-11: 15, fig. 9. 2014.

Common names: Trans-Pecos cyclanthera
Endemic
Treatment appears in FNA Volume 6. Treatment on page 17. Mentioned on page 16.

Stems glabrous; tendrils unbranched. Leaves 3-foliolate, lateral pair of leaflets deeply lobed, petiolules 2–5 mm, terminal leaflet 3–5 cm, blade narrowly lanceolate, petiolule 3–12 mm, narrowly oblanceolate, gradually broadening into leaflet base, leaflet margins coarsely serrate; petioles 16–28 mm. Staminate inflorescences (0.5–) 2–12 cm, floriferous portion (0.5–) 1.2–6 cm, (12–) 18–70-flowered, narrowly racemoid, with racemose or fasciculate lateral branches 3–7 mm; flowers solitary or in fascicles of 2–3. Staminate corollas 3.8–6.3 mm diam. Anther heads 0.6–1 mm diam., sessile, glabrous. Fruiting peduncles 2–7 mm. Capsules ovoid, distinctly oblique-gibbous, short-beaked, (12–) 15–20 mm, spinules (2–) 3–5 mm.


Phenology: Flowering (May–)Aug–Oct.
Habitat: Canyons, rocky slopes, among boulders, igneous soil, roadsides, pinyon-oak-juniper woodlands
Elevation: 1100–2500 m

Discussion

Cyclanthera stenura is distinct from C. gracillima in the more elongate and profusely flowered floriferous portion of its staminate inflorescence and its geography. It occurs in Brewster, Jeff Davis, and Presidio counties of the Trans-Pecos region of Texas.

Selected References

None.

Lower Taxa

None.

"/3" is not declared as a valid unit of measurement for this property.

... more about "Cyclanthera stenura"
distinct +  and connate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Guy L. Nesom +
G. L. Nesom +
attenuate +  and cordate +
3-7-foliolate +
lanceolate +
tubular +, saucer--shaped +, campanulate +  and rotate +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
oblique-gibbous +  and ovoid +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Trans-Pecos cyclanthera +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.63 cm6.3 mm <br />0.0063 m <br />) +
1100–2500 m +
furrowed +  and echinate +
dehiscent +  and indehiscent +
bristly +, smooth +, hairy +  and glabrous +
tuberculate +  and muricate +
fleshy +  and hard +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +  and 0.2 cm2 mm <br />0.002 m <br /> (?) +
pistillate +  and staminate +
echinate +  and fleshy-capsular +
green;light green +
narrowly obliquely ovoid +  and obliquely globose or obovoid gibbous acute +
Canyons, rocky slopes, among boulders, igneous soil, roadsides, pinyon-oak-juniper woodlands +
perennial +
dioecious +  and monoecious +
solitary +, corymbose +, fasciculate +, racemose +  and paniculate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
3-foliolate +
well-differentiated +
sculptured +
coarsely serrate +  and shallowly or deeply lobed +
ovoid;elliptic-ovoid or subglobose +
induplicate-valvate +  and imbricate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
oblanceolate +
broadening +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering (May–)Aug–Oct. +
(12-)18-70-flowered +  and floriferous +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Phytoneuron +
not arillate +
compressed +, ovoid +  and oblong +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
climbing +  and procumbent +
sprawling +  and prostrate +
depressed-subglobose +
short-columnar +
tuberculate +
Cremastopus +
Cyclanthera stenura +
Cyclanthera +
species +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
connate-fused +
plant +  and climbing +