Cucurbita melopepo var. texana

(Scheele) G. L. Nesom

Phytoneuron 2011-13: 24. 2011.

EndemicIllustrated
Basionyms: Tristemon texanus Scheele Linnaea 21: 586. 1848 (as texanum)
Synonyms: Cucurbita pepo var. texana (Scheele) D. S. Decker
Treatment appears in FNA Volume 6.

Pepos usually green-and-white-striped at maturity, sometimes yellow. Seeds: germination within 3–7 days.


Phenology: Flowering Jun–Nov.
Habitat: Stream beds, lake shores, marsh banks, low woods, dunes, disturbed sandy sites
Elevation: 0–100 m

Discussion

Isozyme and RAPD data indicate that var. texana is limited to south-central Texas (D. S. Decker et al. 1993, 2002b; C. W. Cowan and B. D. Smith 1993). Attribution of var. texana to New Mexico apparently has been erroneous. Plants associated with the Mississippi River drainage are var. ozarkana, according to the molecular analyses.

Molecular differentiation between var. ozarkana and var. texana suggests that reproductive isolation has allowed an accumulation of differences; H. Teppner (2004) regarded morphological variability as too overlapping to allow their unarbitrary separation. Molecular data reliably separate them and clearly delimit var. fraterna as well; morphology needs to be restudied. Fruits of var. ozarkana usually are ivory white at maturity versus striped in var. texana, but this is not completely consistent (T. C. Andres and H. B. Tukey 1995; pers. obs.).

Selected References

None.

Lower Taxa

None.

"/2" is not declared as a valid unit of measurement for this property.

distinct +  and connate +
Guy L. Nesom +
(Scheele) G. L. Nesom +
pustulate +
cordate +
Tristemon texanus +
15 cm150 mm <br />0.15 m <br /> (18 cm180 mm <br />0.18 m <br />) +
17 cm170 mm <br />0.17 m <br /> (23 cm230 mm <br />0.23 m <br />) +
white-spotted +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
broadly ovate-cordate;triangular-cordate or suborbiculate +
5cm;17cm +
tubular +, saucer--shaped +, campanulate +  and rotate +
yellow +  and golden yellow or orange +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0–100 m +
furrowed +  and echinate +
dehiscent +  and indehiscent +
bristly +, smooth +, hairy +  and glabrous +
tuberculate +  and muricate +
fleshy +  and hard +
connate +  and distinct +
yellow +  and light orange or greenish or whitish +
staminate +, from different axils than staminate +  and pistillate +
cultivated +
stipitate;peltate +
Stream beds, lake shores, marsh banks, low woods, dunes, disturbed sandy sites +
perennial +
dioecious +  and monoecious +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
umbellate;subumbellate +
solitary +, corymbose +, fasciculate +, racemose +  and paniculate +
petiolate +, estipulate +  and simple +
ovate-deltate;obovate or obovate-rhombic +
denticulate +  and serrate-denticulate +
raised-thickened +
not +  and differentiated +
elongate-whitened +
woody +  and hardened +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
induplicate-valvate +  and imbricate +
9 cm90 mm <br />0.09 m <br /> (12 cm120 mm <br />0.12 m <br />) +
pubescent +  and puberulent +
2.5 cm25 mm <br />0.025 m <br /> (9 cm90 mm <br />0.09 m <br />) +
9 cm90 mm <br />0.09 m <br /> (16 cm160 mm <br />0.16 m <br />) +
stipitate-glandular;hispidulous;hirsutulous +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Flowering Jun–Nov. +
Phytoneuron +
arillate +  and winged +
1.5 cm15 mm <br />0.015 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
germinating +
orbiculate +, elliptic +  and obovate +
linear +  and subulate-linear +
subulate-linear;lanceolate +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Endemic +  and Illustrated +
bushy +  and shrublike +
sprawling +  and prostrate +
0 cm0 mm <br />0 m <br /> (300 cm3,000 mm <br />3 m <br />) +
hispidulous +  and hirsutulous +
Cucurbita pepo var. texana +
Cucurbita melopepo var. texana +
Cucurbita melopepo subsp. texana +
variety +
eglandular +  and 2-7-branched +
hirsutulous +  and pubescent +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +