Xyris difformis var. curtissii

(Malme) Kral

Sida 2: 255. 1966.

Basionym: Xyris curtissii Fernald Ark. Bot. 13(8): 24. 1913 Xyris neglecta Chapman 1894,
Synonyms: Xyris bayardii Small Xyris serotina var. curtissii (Malme) Kral
Treatment appears in FNA Volume 22.

Herbs, 15–20 cm. Leaves spreading-ascending in broad fans, mostly under 10 cm; sheaths reddish or purplish, rugulose-papillate; blade dull green, linear–sword-shaped, 1–4 mm wide, often papillate, margins somewhat scabrous. Inflorescences: scape sheath base rich rich, deep redbrown, lustrous; scapes linear-filiform, angulately terete, not much widened distally, several-ribbed, ribs equally prominent, somewhat scabrous; spikes mostly 5 mm or less. Seeds translucent. 2n = 18.


Phenology: Flowering summer–fall.
Habitat: Moist to wet sands or sandy peats of bog slicks, sphagnous areas, pine savanna, pond shores, and acid seeps
Elevation: 0–200 m

Distribution

V22 255-distribution-map.jpg

Ala., Ark., Fla., Ga., La., Miss., N.C., S.C., Tex., Va., Central America (Belize)

Discussion

Xyris difformis var. curtissii remains distinct even when mixed with the other two varieties, a common event in the southern Atlantic and Gulf coastal plains.

Selected References

None.

Lower Taxa

None.

"thin" is not a number."less" is not a number.

rounded +  and acute +
Robert Kral +
(Malme) Kral +
not bulbous +
Xyris curtissii +  and Xyris neglecta +
ephemeral +
papillate +
linear-sword--shaped +
4 cm40 mm <br />0.04 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +, Va. +  and Central America (Belize) +
0–200 m +
basal-lateral +
proteinaceous +  and starchy +
loculicidal +
Moist to wet sands or sandy peats of bog slicks, sphagnous areas, pine savanna, pond shores, and acid seeps +
moniliform +
margined +  and winged +
lacerate +
scarious +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
equitant +, 2-ranked +  and alternate +
spreading-ascending +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
papillate +  and smooth +
distinct +
unfolding +
Flowering summer–fall. +
monosulcate +
prominent +
papillate +  and scabrous +
ancipital-2-edged-winged +
terete +  and linear-filiform +
bladed +  and open +
widened +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
cross-lined +
ovoid +  and ellipsoid +
0.5 cm5 mm <br />0.005 m <br /> (?) +
connivent +  and opposite +
distinct +
unequal +
rugulose-papillate +
decussate +  and imbricate +
epipetalous +
branching +  and simple +
elongate +  and caudiciform +
funnel +  and u--shaped +
tubular +  and elongate +
Xyris bayardii +  and Xyris serotina var. curtissii +
Xyris difformis var. curtissii +
Xyris difformis +
variety +
70 cm700 mm <br />0.7 m <br /> (90 cm900 mm <br />0.9 m <br />) +