Eriogonum multiflorum var. riograndis

(G. L. Nesom) Reveal

Harvard Pap. Bot. 9: 184. 2004.

Common names: Rio Grande wild buckwheat
Endemic
Basionym: Eriogonum riograndis G. L. Nesom Sida 20: 32, fig. 1. 2003
Treatment appears in FNA Volume 5. Mentioned on page 327.
Revision as of 09:40, 30 July 2020 by imported>Volume Importer
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Leaf-blades oblong to narrowly ovate, 1.5–4 (–4.5) × 1–2.2 (–2.5) cm, floccose to glabrate adaxially, occasionally thickened, auriculate-subclasping proximally.


Phenology: Flowering Aug–Nov.
Habitat: Sandy to gravelly flats and slopes, mixed grassland and mesquite communities, oak and conifer woodlands
Elevation: 0-300 m

Discussion

Variety riograndis is mostly infrequent and widely scattered in central southern Texas (Aransas, Brooks, Calhoun, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells, Karnes, Kenedy, Kleberg, Nueces, Refugio, San Patricio, Webb, Willacy, Wilson, and Zapata counties), becoming common only near the coast.

Variety riograndis is found just to the west and south of var. multiflorum, and a series of overlapping (and intergrading) populations occurs along their shared boundary. Plants immediately along the coast of Texas often have thickened, almost crassulate leaf blades.

Selected References

None.

Lower Taxa

None.

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included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
(G. L. Nesom) Reveal +
deciduous +  and persistent +
stipelike +
Eriogonum riograndis +
auriculate-subclasping +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2.2 cm22 mm <br />0.022 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
floccose +  and glabrate +
narrowly lanceolate;narrowly elliptic or oblong +
0.3 cm3 mm <br />0.003 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
not awn-tipped +
glandular +, pubescent +  and glabrous +
triangular +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not brittle +
tomentose +  and floccose +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
Rio Grande wild buckwheat +
0-300 m +
unisexual +, , +  and bisexual +
not attenuate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
not disarticulating +  and solid +
decumbent to erect +  and prostrate +
stout;slender +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Sandy to gravelly flats and slopes, mixed grassland and mesquite communities, oak and conifer woodlands +
compact +  and open +
capitate +  and subcapitate +
50 cm500 mm <br />0.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
connate +  and free +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
tomentose +  and floccose or occasionally glabrous abaxially +
turbinate +  and turbinate-campanulate +
nonmembranous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
auriculate-subclasping +
4 cm40 mm <br />0.04 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
2.2 cm22 mm <br />0.022 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
floccose +  and glabrate +
oblong +  and narrowly ovate +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
cauline +  and basal +
bractlike +
pubescent +  and glabrous +
crisped +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
tomentose;floccose +
erect to deflexed +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
white;reddish-brown +
pubescent +  and glabrous +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and floccose +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Aug–Nov. +
homostylous +  and 3-carpellate +
Harvard Pap. Bot. +
, +  and solid +
slender;stout +
persistent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
decumbent to erect +  and prostrate +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
spreading;erect +
chambered +  and solid +
slender +  and stout +
Eriogonum multiflorum var. riograndis +
Eriogonum multiflorum +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
lobed +  and laciniate +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and biennial +
floccose +  and tomentose +
3 +, 2 +  and 1 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +