Torreyochloa pallida

Culms 18-145 cm tall, 0.6-4.8 mm thick, erect to decumbent, sometimes matted. Ligules of larger cauline leaves 2-9 mm, truncate or acute to attenuate; widest cauline blades 1.5-18 mm wide. Panicles (3)5-25 cm long, (1)1.8-16 cm wide, 1-5.75(7.5) times as long as wide, narrowly to widely conic, ovoid, or obovoid at maturity; lowermost branches stiff to flexuous, reflexed to erect at maturity. Spikelets 3.6-6.9 mm, with 2-8 florets. Lower glumes 0.7-2.1 mm; upper glumes 0.9-2.7 mm; lemmas 2-3.6 mm, truncate to acute; anthers 0.3-1.5 mm. 2n = 14.

Distribution

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• Legacy Map

Conn., N.J., N.Y., Wash., Del., Wis., W.Va., Mass., Maine, N.H., R.I., Vt., Wyo., N.Mex., N.C., Alta., B.C., Man., N.B., Nfld. And Labr., N.S., Ont., P.E.I., Que., Sask., Yukon, Tenn., Pa., Calif., Nev., Va., Colo., Alaska, Ill., Ga., Ind., Ariz., Idaho, Md., Ohio, Utah, Mo., Minn., Mich., Mont., S.C., Ky., Oreg., S.Dak.

Discussion

All three varieties of Torreyochloa pallida grow in swamps, marshes, bogs, and the margins of lakes and streams. They are usually morphologically distinct, and tend to have different geographic ranges.

Selected References

None.

Lower Taxa

Torreyochloa pallida var. fernaldii, Torreyochloa pallida var. pallida, Torreyochloa pallida var. pauciflora

Key

1	Widest cauline blades 1.5-3 mm wide; anthers of the lowest floret in each spikelet 0.3-0.6 mm long	Torreyochloa pallida var. fernaldii
1	Widest cauline blades 2.8-18 mm wide; anthers of the lowest floret in each spikelet 0.5-1.5 mm long.	> 2
2	Anthers of the lowest floret in each spikelet 0.7-1.5 mm long; basal diameter of the culms 1.2-3 mm; upper glumes 1.4-2.7 mm long; plants generally of eastern North America	Torreyochloa pallida var. pallida
2	Anthers of the lowest floret in each spikelet 0.5-0.7 mm long; basal diameter of the culms (1.3)1.8-4.8 mm; upper glumes 0.9-1.8 mm long; plants of western North America	Torreyochloa pallida var. pauciflora