×pucciphippsia vacillans

(Th. Fr.) Tzvelev
Treatment appears in FNA Volume 24. Treatment on page 478.
Please click on the illustration for a higher resolution version.
Illustrator: Bee F. Gunn

Copyright: Utah State University

Culms 7-15 (23) cm, erect, glabrous. Sheaths closed for 1/3-2/3 their length; ligules 0.5-2.7 mm, apices entire, truncate, rounded or acuminate; blades 1.5-6 (8) cm long, 1.5-3 mm wide. Panicles 1.5-4.5 cm long, 1-2 cm wide; branches smooth; primary branches 1.3-14 mm, erect to ascending. Spikelets 2-3.5 mm, pedicellate; rachillas glabrous or pubescent, internodes 0.2-2.2 mm, prolonged beyond the uppermost floret. Glumes glabrous; lower glumes 0.4-0.8 mm, (0) 1-veined, occasionally absent; upper glumes 0.5-1.4 mm, 1-3-veined, obtuse; lemmas i. 8-2.6 mm, (1) 3-veined, pilose basally, particularly on the veins, apices entire or erose, truncate to acute; paleas 1.5-2.5 mm; anthers 1-3, 0.5-1 mm. 2n = 21.

Discussion

×Pucciphippsia vacillans is a sterile hybrid between Puccinellia vahliana and Phippsia algida. It grows in damp, open habitats such as wet meadows, wet tundra, pond margins, and imperfectly drained areas in silt, till, and moss. It is currently known in North America from Axel Hedberg, Bathurst, Cornwallis, Ellesmere, Devon, and Baffin islands in arctic Nunavut, and from Midgaardsormen, Greenland. Outside North America, it is found on Svalbard and Novaya Zemlya islands, where both parents are also present.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "×pucciphippsia vacillans"
membranous +  and scarious +
indehiscent +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
erose +  and entire +
truncate +  and acute +
Stephen J. Darbyshire +
(Th. Fr.) Tzvelev +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
not evident +
folded +  and flat +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
spikelike +
hairy +  and glabrous +
not branching +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
not woody +
Greenland +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
2 +  and 3 +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
1 +  and 2 +
acute +  and obtuse +
unequal +
membranous +
uncinate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
lanceolate +  and ovate +
0.8 cm8 mm <br />0.008 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
membranous +
inconspicuous +
lanceolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
2-keeled +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1.5cm +  and 4.5cm +
spikelike +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dry +  and fleshy +
0.13 cm1.3 mm <br />0.0013 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
pubescent +  and glabrous +
1 +  and 60 +
compressed +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
×pucciphippsia vacillans +
×pucciphippsia +
species +
membranous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
parallel +  and converging +
stoloniferous +  and rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +