Ammophila breviligulata subsp. breviligulata

Common names: American beachgrass Ammophile à ligule courte
Treatment appears in FNA Volume 24. Treatment on page 777.

Flag leaf-blades 5-39 cm. Panicles (9.5) 13-40 cm. Glumes 8-15 mm; lemmas 8-11.5 (14) mm; anthers 3.5-7 mm. 2n = 28.

Discussion

Ammophila breviligulata subsp. breviligulata grows on sand dunes and dry, sandy shores from around the Great Lakes to the Atlantic coast from Newfoundland to South Carolina and, as an introduction, on the west coast. Anthesis is from late July to September. It hybridizes with Calamagrostis canadensis on Grand Island, Michigan, and the adjacent mainland, to form xCalammophila don-hensonii Reznicek & Judz. The hybrid is morphologically intermediate between its parents. Most florets appear to be sterile; some appear normal. Discovery of a plant that appears to be a backcross to Calamagrostis canadensis supports the possibility that some of the hybrid seed is functional.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

membranous +  and scarious +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Mucronate (?) +  and Acute (?) +
Mary E. Barkworth +
Fernald +
1 (?) +  and 3 (?) +
straight +
subterminal +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
15 cm150 mm <br />0.15 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not evident +
convolute +  and involute +
4mm;8mm +
spikelike +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
4-veined +  and 2-veined +
American beachgrass +  and Ammophile à ligule courte +
not branching +
50 cm500 mm <br />0.5 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, Del. +, Wis. +, N.H. +, N.C. +, Pa. +, R.I. +, B.C. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Mass. +, Maine +, Vt. +, Calif. +, Ill. +, Ind. +, Md. +, Ohio +, Minn. +, Mich. +, S.C. +  and Oreg. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
acute +  and acuminate +
subequal +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
exceeding the florets +  and equaling +
uncinate +
rounded +, keeled +  and linear-lanceolate +
0.8 cm8 mm <br />0.008 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
somewhat thicker +
truncate +  and obtuse +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
inconspicuous +
glabrous +  and ciliate +
not toothed +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
9.5 cm95 mm <br />0.095 m <br /> (?) +
9cm +  and 40cm +
spikelike +
13 cm130 mm <br />0.13 m <br /> (40 cm400 mm <br />0.4 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
dry +  and fleshy +
hairy +  and glabrous +
1 +  and 60 +
compressed +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Ammophila breviligulata subsp. breviligulata +
Ammophila breviligulata +
subspecies +
membranous +
parallel +  and converging +
aquatic +  and terrestrial +