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Key to Mnesithea

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Show caption*© jrebman, some rights reserved (CC BY-NC), uploaded by jrebman 1 Annual; sessile spikelets hemispheric; lower glumes of the sessile spikelet alveolate; [exotic weed]  Mnesithea granularis

1 Perennial (cespitose or rhizomatous); sessile spikelets ovate; lower glumes of the sessile spikelet rugose or pitted; [native].

Show caption*© theo_witsell, some rights reserved (CC BY-NC), uploaded by theo_witsell   2 Culms round in cross-section  Mnesithea cylindrica

2 Culms compressed-keeled in cross-section.

Show caption*© Scott Ward     3 Lower glume with rectangular pits  Mnesithea tessellata

3 Lower glume smooth or with transverse ridges.

Show caption*© Scott Ward       4 Lower glume with transverse ridges  Mnesithea rugosa

Show caption*© Scott Ward       4 Lower glume smooth  Mnesithea tuberculosa