63 



*■' 



of a Stalk which has been, soaked a long time in warm water. The 

 rhizome is mostly erect, often standing nearly a foot out of ground, 

 and with its circle of spreading fronds gives the plant the aspect of a 

 miniature tree-fern. 



25. Notholaena nivea, Desvaux.— Root-stock short, chaffy Avith ^ 

 narrow scales ; stalks clustered, wiry, black and polished; fronds 3 



to 6 inches long, pyramidal-ovate, tripinnate ; primary pinnae mostly 

 opposite, the rachises nearly straight ; pinnules 2 to 3 times as long, 

 ovate or oval, obtuse, entire or more or less lobed, smooth and green 

 above, beneath densely white'-pulveraceous, sporangia brown, often 

 descending tlie free veins more than half-way to the midvein. 



Arizona, the particular station not given ; Mr. J. G. Lemmon, 

 collected very recently. This fern is so closely related to N, Fe^ndlcri 

 and N. dealbata^ that the three might almost be considered forms of 

 one species. N. nivea has narrower fronds than N. Fendleri^ its 

 rachis is straight, the principal pinnae are opposite, and the frond is 

 less compound, and has larger pinnules. N, dealbata is a smaller 

 plant, the fronds more compound and the pinnules much smaller. 

 N. nivea occurs commonly in Mexico, and its range extends south- 

 wards to Peru. y 



26. Notholaena Lemmoni, sp. nov. — Root-stock short, scaly with ^ 

 narrow pointed rigid dark-brown chaff ; stalks dark reddish-brown, 

 wiry, 4 to 6 inches long, chaffy at the base with scales a little wider 

 and more scarious-margined than those of the root-stock, otherwise 

 smooth ; fronds 6 to 9 inches long, i to \\ ij^ches wide, linear-ob- 

 long, pinnate with numerous deltoid or ovate once or twice pinna- 

 tifid pinnae, the lowest ones a little shorter than the middle ones ; 

 upper surface herbaceous-green, smooth ; lower surface covered with 

 white or slightly yellowish ceraceous powder ; sori forming a narrow 

 sub-marginal line ; margins of the segments very slightly recurved. 



Found in the clefts of granite rocks, on the southern side of the 

 Santa Catarina Mountains, near Fort Lowell, and the town of Tuc- 

 son, Arizona, by Mr. J. G. Lemmon (now residing at Oakland, Cali- 

 fornia) in the Spring of 1880. 



This fern evidently belongs to the same group of Notholaena 

 (§ Cincinnalis) as N. Candida, but differs from that species essentially 

 in the long and narrow fronds, having also the lowest pair of. pinnae 

 smaller than the others near it, instead of being much the largest of 

 any. From N, Grayi, its larger size, and the total absence of chaff 

 from the frond will easily distinguish it. Mr. Lemmon is the dis- 

 coverer of several of our rarer' Californian ferns, and it is with real 

 pleasure that I am able at last to name a fern of his own discovery 

 in his honor. His Arizona collection, not yet distributed, con- 

 tains many other rare ferns of interest, such as Notholaena Candida^ 

 Hookeri^ dealbata^ Farryi^ siniiata and ferruginea^ CheilantJus myri- 

 ophylla, Fendleri, Lindheimeri, Wrightii, Eatoni, Gymnogramnic his- 

 pida, Pellaea Wrightiana, etc., etc. . 



27! Phegoj)teris calcarea, Fee. — This European fern, though 

 often attributed to North America, has only very recently proved 

 its right to a place among our ferns. It w^as collected a few years 

 ago by Miss Ellen W. Cathcart on slaty rocks, on the bank of- the 



