Box 16, Folder 6: Grasses of the U.S. Illustrations

[Printed diagrams-Agrostis].

[Pencil sketches-Agrostis vulgans. 14. Pollen, Stigma bound. Spikelet, palea, and glumes].

[Pencil sketches-Agrostis scabra.

a. Glumes. b. Germ. c. Branch, Nat. size.]

Explanation of the Plates.

--------------------------

Genera of Gramineae, or Grasses.

Tab I.

732. Explanation of the Plates.

Brachyelytrum.- A spikelet of B. aristatum enlarged (1); the same displayed (2).

Calamagrostis.- An open spikelet of C. Canadensis, enlarged, displaying all the parts (1); the same with the flower raised out of the glumes, showing the hairy rudiment behind the upper palea (2).

Oryzopsis.-An open magnified spikelet of O. asperifolia (1); and the flower of the same removed from the glumes (2). Notice the remarkably long squamulae or hypogynous scales, which here nearly equal the paleae in length.

Stipa.-Glumes and flower (a little seperated) of S. avenacea, enlarged.

Aristida.-A spikelet of A. purpurascens, enlarged.

Tab III.

Spartina.-Portion of the inflorescence of S. stricta, of the natural size (1); a spikelet enlarged (2); and the same displayed, the flower raised above the glumes (3).

Ctenium.-Spike of C. Americanum (1); a single spikelet magnified (2); and the same displayed, the glumes separated (3).