1902J Merrill, — Notes on North American Grasses 145 



This variety is not valid as it was based on a staminate plant. In 

 the pistillate plants the flowering glumes are constantly profusely 

 webbed at the base, and the keel and lateral nerves are densely pilose 

 below, while in the staminate plants the glumes are entirely glabrous 

 and with only a few webby hairs at the base, or sometimes the hairs 

 are entirely wanting. 



Poa CUSPIDATA Nutt. in Barton, Fl. Phila. 1 : 61. 18 18, excl. syn. 



Pea brevifolia Muhl. Gram. 138. 1817, non Gaud. 1808. 



Poapungens Nutt. Gen. 1 : 66. 1818, nee Georgi 1797-1802, nee 



Bieb. 1808. 



Poa brachyphylla Schultes, Mant. 2 : 304. 1824. 



Nuttall's name Poa cuspidata is the proper one for this species as 

 Poa brevifolia Muhl. is antedated by Poa brevifolia Gaud. In taking 

 up the names Poa cuspidata and Poapungens it was Nuttall's inten- 

 tion to establish a new and more appropriate name for Poa autumnalis 

 Ell., but he evidently had a misconception of that species for his 

 descriptions apply not to Poa autumnalis Ell.,. but to Poa brevifolia 

 Muhl. Schultes' Poa brachyphylla was based on Muhlenberg's Poa 

 brevifolia. Poa cuspidata Roth, and P. cuspidata Baxt., were pub- 

 lished later than Nuttall's name, which is the earliest tenable name 

 for the species, now described in our manuals as Poa brevifolia Muhl. 



Poa ampla sp. nov. A rather stout, erect, glabrous perennial 

 about 15 dm. high, from very stout rootstocks with linear flat leaves 

 and exserted lanceolate purplish panicles about 2.5 dm. long. Culms 

 glabrous throughout ; nodes glabrous ; sheaths shorter than the inter- 

 nodes, glabrous; ligule firm, truncate, 2 mm. long; leaf-blades plane, 

 acute, somewhat glaucous, glabrous beneath, scabrous above, those 

 of the culm 1.5 to 2.5 dm. long, about 4 mm. wide, those of the inno- 

 vations marcescent. Panicles interrupted, 2 to 3 cm. in diameter, 

 the common rachis and the branches erect or ascending, scabrous, 

 fasciculate at the nodes, flower-bearing throughout. Spikelets 7 to 

 8 mm. long, 3-flowered, much exceeding their scabrous pedicels ; 

 empty glumes lanceolate, acute, 3-nerved, scabrous on the keels and 

 nerves, the first 3 to 3.5 mm. long, the second about 1 mm. longer; 

 flowering glumes 4.5 to 5 mm. long, lanceolate, acute, rather promi- 

 nently 5-nerved, minutely punctate-scabrous throughout and more 

 prominently scabrous on the keels and nerves, basal hairs entirely 

 wanting. Palea nearly equaling the glume, scabrous on the keels. 



Type specimen collected at Steptoe, Washington by G. R. Vasey, 

 July 3, 1901, No. 3009. 



A peculiar species, related to Poa ncvadensis and Poa leckenbyi, but 

 distinguished from the former by the very prominent rootstocks, plane 

 leaves, short ligule, few-flowered spikelets and more prominently 

 nerved flowering glumes, and from the latter by its scabrous, not 

 pubescent flowering glumes. 



Panicularia davyi sp. nov. A rather glaucous erect perennial 



