NATURAL SCIENCES OF PHILADELPHIA. 79 



ral western collectors, but I am unable to distinguish it specifically from the 

 plant of the Atlantic States. 645. Tricuspis purpurea, Gray. 646. Stipa 

 Mongolica, Turcz. (Plilagroslis Mongolica, Griseb. in Ledeb., Fl. Ross.) I have 

 no specimen by which to confirm this determination, but it accords so well 

 with the description, except as to size, as to leave little doubt.* This makes 

 the third species with a plumose awn found in our territory. 



647. Sporobolus airoides, Torr. 648. S. cryptandrus, Gray, same as 945 

 of Fendler. 649. Calamagrostis stricta, Trin., with some C. sylvatica 

 intermixed. 650. Kceleria cristata, Pers., a very attenuated form. 651. 

 Andropogon argenteus, DC. (A. Jamesii and A. glaucus, Torr.) 652. Aris- 

 tida purpurea, Nutt. ; the form called A. Fendleriana by Steudel. 653. Pas- 

 palum setaceum, Michx. 



654. Elymus near condensatus, Presl. and apparently E. triticoides, 

 Nutt., mixed. 655. Triticum repens, L., var. [656. T. caninum, L. var., 

 the same as Parry's 381, named T. segilopoides in the coll. of 1861, but wrongly : 

 along with attenuated T. repens, L. 657. T. ^gilopoides, Turcz., A. gropy- 

 rum divergens, Nees.] 



658. Beckmannia eruc^formis, Host. 659. Sporobolus airoides, Torr. 

 660. Vilfa depauperata, Torr. This was described from an extremely re- 

 duced form of a very variable species, of which V. utilis, Torr., is an attenu- 

 ated state. 661. V. cuspidata, Torr. Like others of the genus, this presents 

 great differences in the relative length of the glumes and paleae. 



662. Glyceria pauciflora, Presl. 663. Catabrosa aquatica, Beauv. 

 664. Muhlenbergia gracilis, Trin. 665. Festuca ovina, L., var. duriuscula, 

 Gray. 666. F. rubra, L.; very young. 667. F. scabrella, Torr.? Perhaps 

 a very narrow-leaved form of this species, of which specimens collected by 

 Dr. Bigelow in New Mexico are the opposite extreme. 



668. Poa near P. nemoralis, L. It is 375 of Parry. 669. P. andina, Nutt. 

 in herb. Acad. The Poas of this collection, including some undistributed 

 specimens, present several puzzling forms, which can be accurately deter- 

 mined only by a much more thorough study than can be given them at pre- 

 sent. 670. P. arctica, R. Br., (Parry's 376,) mixed with some of P. alpina. 



671. Agrostis varians, Trin. Agrees well with Hooker's No. 217, quoted 

 by Trinius, but some specimens have a strong awn. 672. Poa serotina. 

 Ehrh. 673. Agrostis near rupestris. 674. Poa alpina, L., mixed with one 

 which may be a variety of it. [675. Poa, near 669 and 677.] 676. P. arctica, 

 R. Br. ? 677. P. andina, Nutt. 678. Poa, undetermined species. 



679. Sitanion elymoides, Raf. Two forms of this variable grass, which 

 will probably be reduced to Elymus. 680. Triticium caninum, L.,var. same as 

 381 of Parry. 681. Hordeum jubatum, L. 682. Alopecurus pratensis, var. 

 alpestris, Wahl. (.4. glaucus, Less.) ex Gray. 683. A. geniculatus, var. 

 aristulatus, Michx. 686. Leptans paniculatus, Nutt. 685. Vaseya 

 comata, n. gen. and sp. This remarkable grass, which really appears to 

 form a new genus, intermediate between the Arundinaceae and the Agrostidefe, 

 is dedicated (by the collectors' desire, seconded by Dr. Gray) to Dr. George 

 Vasey, of Ringwood, Illinois, one of the most zealous of our Western botanists. 

 The following are its principal characters : 



VASEYA, nov. gen. 

 Panicula coarctata. Spiculse uniflora;, herbaceo-membranaceee. Gluma? 

 uninerves florem ada?quantes. Callus obliquus, comam pilorum paleis a?qui- 

 longam gerens. Palea inferior trinervis in aristam gracilem attenuata ; supe- 

 rior sequilonga, acuminata. Stamina 3. Ovarium stipitatum. Styli ultra 

 medium pilis stigmaticis longis simplicissimis instructi. Squamulas . . . 

 Caryopris ... .V. comata, a native of the plains of Nebraska ; is a 



* A comparison with an authentic hut imperfect Mongolian specimen counting Prof. Thurber's 

 determination. A. G. 



1863.] 



