OF ARTS AND SCIENCES: FEBRUARY 13, 1872. 411 



668. Arrhenatherum avenaceum Beauv. Introduced ? 



669. Hierochloe macrophtlla Thurber, in Bolander coll. 



670. Beckmannia erucjeformis Host. 



671. Panicum dichotomum L. var. 



672. Panicum scoparium Lam., fide Thurber. " This is P. macro- 

 carpon Torr. Fl. N. Y., and the P. pauciflorum of Gray, Man., but 

 whether of Elliott is very doubtful. A good character is found in the 

 perfect flower, namely a distinct horizontal fold or ridge at the base of 

 the lower palet." Thurber, in litt. 



673. Polypodium vulgare L., var. occidentale Hook. Fl. 

 Bor.-Am. 2, p. 258. 



674. Polypodium Scouleri Hook. & Grev. Ic. Fil. t. 56. 



675. Gymno gramme triangularis Kaulf. ; Hook. & Grev. Ic. 

 Fil. t. 153. 



676. Adiantum pedatum L., and, 677, a little A. Chilense 

 Kaulf., not before found so far north. 



678. Pteris aquilina L., var. lanuginosa Hook. Spec. Fil. 



679. Cryptogramme acrostichoides R. Br. ; Hook. & Grev. 

 Ic. Fil. t. 29. 



680. Lomaria Spicant Desv. Blechnum boreale Swartz ? Hook. 1. c. 



681. Asplenium Trichomanes L. Rather larger than the East- 

 ern American form. 



682. Asplenium (Athyrium) Filix-fcemina Bernh., mostly with 

 pinnules deeply pinnatifid. 683. Var. Michauxii Mettenius ; D. C, 

 Eaton in King Expl. p. 396: a remarkable form of the species. 



684. Phegopteris Dryopteris Fee. Polypodium Dryopteris L. 



685. Aspidium spinulosum Swartz, var. dilatatum. 686. An- 

 other form of the same. 



687. Aspidium Filix-mas Swartz ; the Californian form, namely 

 A. argutum Kaulf. 



688. Aspidium munitum Kaulf. ; a short form. 689. Same with 

 shorter and obtuse pinnae, imitating A. Lonchitis. 



690. Grystopteris fragilis Bernh. 691. Another form of the 

 same. 



692. Woodsia scopulina D. C. Eaton in Canad. Nat. 1865 ; 

 Baker, Syn. Fil. 



693. Isoetes Nuttallii A. Braun, probably not yet published. 

 According to Dr. Engelmann, it is distinguished by the velum entirely 

 covering the sporangium, and by the strongly ridged but slightly tuber- 



