174 Plantae Ainlrrwsme. 



trate : I had inclined to the view that Dr. Greene's Lithmpermmn 

 albicans was merely a whiter and slenderer form of L. linerifo- 

 lium and I named some specimens in accordance with this view. 

 Mr. Andrews had these species growing in his gardens and 

 knew from their autimmal condition that tliey were different. 

 To satisfy me he sent me al)nndant material of each, and I am 

 now growing them in pots side l)y side. L. linerifoliiiin goes 

 into the winter Avith the next year's leaves well formed and con- 

 stituting fully developed rosettes on the summits of the short 

 hranched crowns of the roots. L. albirans, on the other hand, 

 possesses no evergreen leaves and the crowns of tiie less 

 liranched and deeper set roots are wholly naked. To see the 

 two begin their development from their autumnal condition was 

 completely convincing. One more example : The Colorado 

 Eustoma we have called E. Riix><c!Ji(iinnn . Mr. Andrews, noting 

 that this species was well known as an annual, recalled that the 

 Colorado specimens had not thus impressed him when he col- 

 lected them. To satisfy himself he visited again the Eii-stoma. 

 patch in the mountains. After examining some hundreds of 

 plants he found that not one had failed to develop, as a rosette, 

 the next year's crown leaves. Further evidence that the plant 

 is perennial, were it needed, he finds in the old stems that 

 occasionally persist on the crowns. 



HaAdng l^een kindly permitted to examine some of Mr. An- 

 drews' choice collections I wish to repoi-t the following results 

 of my study. Knowing, as I do, the character of his work I 

 account it a privilege to extend to liiiii the recognition that 

 appears in this paper. 



All types are deposited in the Rockj- Mountain Herl)arium. 



Asplenium andrewsii sp. nov. 



Rootstock short, wholly envelo].)ed in matted roots ; stipes naked, ebe- 

 neous below, becoming green above, from 2-10 cm. long, somewhat angled 

 or striate; lamina thinly herbaceous, deltoid-ovate or narrower, 3-10 cm. 

 long, somewhat narrower at its widest part, bipinnatifid, diminishing 

 nearly uniformly from base to tip ; pinnse lanceolate, the lower nearly at 

 right angles to the rauhis, the upper ascending, gradually diminishing and 

 passing into the pinnatifid tip, all rather closely approximate and subop- 

 posite or the lower more distant (1 cm. or more) and alternate; pinnules 

 3-12 mm. long, ovate, more or less cuneate at base, sharply incised but cut 

 not quite to the costa, sharply and somewhat incisely sei'rate ; the veins 



