78 PROCEEDINGS OP THE ACADEMY OF 



forma typica. 605. C. fili folia, Nutt. ; the ordinary form. [Parry's 442 is 

 a high alpine form of the same species.] 



606. Carex obtusata, Lil. 607* C. pauciflora, Lightf. .608 . C. Pyrenaica, 

 WalTT. 609. C. nigricans, C. A. Meyer. 610. C. scirpoidea, Michx. 611. 

 C. Geyeri, Boott. 612. C. Backii, Boott. 613^ C. capillaris, L. 



614. Carex longirostris, Torr., var. minor ; culmo brevi ; spicis abbrevi- 

 atis : rostro breviore. 615. C. ampullacea, L. (ntricnlata, Boott.) 616 . C. 

 Jamesii, Torr. and C. angustata, Boott, mixed. £17. C. Parryaxa, Dewey. 

 Some specimens have two spikes, the terminal masculine ; others have either 

 one or two spikes, both wholly feminine. 618. C. alpina, Sm. ( Vahlii, 

 Schk.) 619. CrBrxBAUMii, Wahl. 620. C. Rossn, Boott. 



GR AMINES* 



* 



621. An ambiguous and undetermined Grass, between Festuca and Melica. 

 622. Danthoxia sericea, Nutt. [Z>. unispieata, Munro, ined., i3 a reduced form 

 of this, to which belongs Geyer's No. 189.] 623 . Avena striata, Michx. 

 6^4. Calamagrostis sylvatica, DC. 625. Trisetum subspicatum, Beauv. r 

 with a remarkable open-panicled form. ""526. Stipa yiridula, Trim, the 8. 

 parviflora, Nutt. 627. Aira c^ispitosa, L." two forms ; the smaller and more 

 alpine of which is the var. arctica (Deschampsia brevifolia, R. Br.) ; the larger is 

 intermediate between that and the ordinary form of the species. Parry's 367 

 of 1862 connects the two. 



628. Hierochloa borealis, R. and S. 629. Glyceria aquatica, Smith. 

 ~~2, Cr. (Heleochloa) airoides, Thurb., tlTe Poa airoides, Nutt. 



631. Yilfa tricholepis, Torr. ; a remarkable species, which it may be 

 necessary upon further study to remove from the genus. 632. Muhlenber- 

 gia pungens, n. sp.f 633. Eriocoma cuspidata, Nutt. £34. Oryzopsis 

 micrantha ; Urackne micrantha, Trin. A very distinct species, differing from 

 O. Canadensis, Torr., in it3 elongated panicle, smaller spikelets, glabrous 

 palere, and much longer awn. 635. Graphephorum ? flexuosum, n. sp.t 

 636. Bouteloua oligostachya Torr. 637. Buchl(e dactyloides, Engelm. 

 Teria, Nutt.); the staminate plant only. 638. Mtjnroa squarrosa, Torr. 

 §39. Spartina gracilis, Trin. ; the name wrongly attributed to Hooker by 

 Steudel ; it is S. junciformis, Engelm. and Gray, PL Lindl. 1, No. 207. 

 640. Brizopyrum spicatum, Hook, var. strictum. 



£41. Sporobolus asperifolius, Nees and Meyen. 642. Muhlenbergia 

 gracillima, Torr. 643 . Sporobolus ramulosus, HBK.'^ %44 . Leptochloa 

 fascicularis, Gray ; a remarkable and large form ; which has been by seve- 



* By Prof. George Thurber. On account of illness, Prof. Thurber has been prevented from study- 

 mg tnese Grasses as thoroughly as could be wished. A more critical account of some of them mav 

 be expected hereafter. J 



f MtJHLEXBERGiA pungexs (Thurber, sp. nor.) : culmo e rhizomate repente l-lf-pedali foliisqno 

 rigidis convnhitis pnngentibus patentibus (1-1* poll, longis haud hneam latis) minute pubescenti- 

 bun, Iigula brevi cihata ; paniculae 3-4-pollicaris radiis solitariis dissitis basi nndis fasciculatim ramo- 

 ws; pedicelhs capillaribus scabris spiculis (cum arista 2i lin. longis) pluries longioribus- glumis 

 fere a?qualihuB acuminatis vol seta apiculatis flore dimidio brevioribus: callonndo rudimento mini- 

 mo pnedito; palea inferiori scabra acuta in aristam aHptran^flfcel sublineam longam pro- 

 ducta, supenon subajquilonga, nervis excurrentibus bisetiferlS^RSinibus 3.— A striking spe- 

 cies with very pale green foliage, and a purplish panicle. Collects also by Mr. H. Engelmann in 

 Nebraska, and by Dr. J. S. ;Newberrv in Ives' Colorado Expedition} ' 



^iRAPHEPHORrM? flsxuosum (Thurber, sp. nov.): culmo tripedali lavi; yaginis internodia 

 f superantibus annulo piiorum pro lhrula instructs: folii« RA«ininwi«ilih«i. o k* i.«« B0 » ^. 



membranaceis uninerviis acutis 



scabro-p ubeace n te 



erosc^enticulata cum mucrone basi villifera, superiori subajquilonga eximie bicarinata bidentata. 

 w^Ji" ♦.STS.™ »J 1 P ltatum - ^uamula 2, oblique truncat*. Caryopsis libera. Dr. J. M. Bige- 

 low collected this Grass several years ago on the Canadian River. It is doubtfully referred to Grc* 



^,!iT' W L^*^ a *? e ? U8 A d0 ? ne J. by Dr * Gra J r in the Proceedings <tf the Botanical Society of 

 Canada. But the joints of the rhachis are very short, and the tuft of haS seems rather to belong 



to the palea. 



[Mar. 



