Xyris stricta var. obscura

Kral

Novon 9: xxx, fig. 8. 1999.

Endemic
Synonyms: Xyris louisianica
Treatment appears in FNA Volume 22.

Herbs, 40–80 (–85) cm. Leaves (15–) 20–40 (–44) cm; blade mostly (2–) 2.5–3 (–5) mm wide, margins papillate to ciliolate. Inflorescences: scapes terete, ribs 2, strong, distal, with additional narrower, but still strong ribs; all ribs scabrous or scabro-ciliolate; spikes ellipsoid to ovoid or lanceoloid, 1–2 (–2.7) cm; fertile bracts nearly orbiculate, 5–6.5 (–7) mm, margins entire. Flowers: lateral sepals (4.5–) 5–6 (–7) mm. Seeds 6–7 (–8) mm.


Phenology: Flowering summer–fall.
Habitat: Moist sands and sandy peats of pine savanna, bogs, clearings, ditchbanks, coastal plain
Elevation: 0–200 m

Distribution

V22 538-distribution-map.jpg

Ala., Fla., Ga., La., Miss., Tex.

Discussion

In Louisiana, Alabama, northwest Florida, and Georgia are what appear to be intergrades with Xyris stricta var. stricta.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

convex +, keeled +, blunt +  and acute +
Robert Kral +
open +  and sheathing +
ephemeral +
papillate;smooth +
obtriangular +
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
orbiculate +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
Ala. +, Fla. +, Ga. +, La. +, Miss. +  and Tex. +
0–200 m +
basal-lateral +
proteinaceous +  and starchy +
loculicidal +
Moist sands and sandy peats of pine savanna, bogs, clearings, ditchbanks, coastal plain +
moniliform +
margined +  and winged +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
equitant +, 2-ranked +  and alternate +
40 cm400 mm <br />0.4 m <br /> (44 cm440 mm <br />0.44 m <br />) +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
papillate +
distinct +
unfolding +
Flowering summer–fall. +
monosulcate +
scabro-ciliolate +  and scabrous +
additional +  and 2 +
scabrous +  and papillate +
narrower +
bladed +  and open +
1.5mm;3mm +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cross-lined +
cylindro-fusiform +
0.6 cm6 mm <br />0.006 m <br /> (?) +  and 0.7 cm7 mm <br />0.007 m <br /> (?) +
connivent +  and opposite +
distinct +
unequal +
smooth +  and papillate +
2 cm20 mm <br />0.02 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
decussate +  and imbricate +
ellipsoid;ovoid or lanceoloid +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
epipetalous +
branching +  and simple +
elongate +  and caudiciform +
funnel +  and u--shaped +
tubular +  and elongate +
Xyris louisianica +
Xyris stricta var. obscura +
Xyris stricta +
variety +
80 cm800 mm <br />0.8 m <br /> (85 cm850 mm <br />0.85 m <br />) +