30 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Remarks on the Species. — N. harveyanuni varies in color 

 in the living state from deep salmon red to dull carmine, 

 becoming purplish to blackish red when dried. The plant 

 may reach a height of 20 cm., but is as a rule 6-10 cm. 



The prostrate frond in N. harveyann^n does not develop 

 so extensively as in other species. It is destitute of midrib 

 and nerves, and is not specially thickened. N. harveyanum 

 is a sparingly branched form as regards its erect frond and 

 the whole plant is rather stiff and unyielding, even when 

 freshly taken from the water. The midrib is conspicuous, 

 tapering slightly towards its upper extremity, and rather 

 suddenly becoming divided into flabellate nerves. The 

 margin in the lower portions of the frond and upon the stalk 

 frequently wears away, the remaining median portion then 

 becoming thickened and cylindrical. In the branches the 

 margin occasionally is serrate or laciniate. 



N. harveyanum was first collected on this coast at Land's 

 End, San Francisco, by Professor W. A. Setchell. It grew 

 in company with N. multihbum, to which, at this locality, 

 it bears some resemblance, on account of its size and vena- 

 tion. Professor Setchell, however, upon noting the non- 

 bullose character of the frond and the flabellate arrangement 

 of the sori, so different from the transverse sori of JV. mul- 

 tilohicm, concluded that the plant was a distinct species. 

 The writer, when examining the plant in connection with 

 other material secured by him at Fort Ross, was of the 

 opinion that it must be the plant described by Agardh (1876, 

 p. 699) under the name N. jiahelligerum, although pre- 

 viously the conclusion had been reached that Agardh's N. 

 jlaheUigerum was but a form of JSf. ruprechtiamim. 



Sufficient comment has been made already upon the dis- 

 tinctions to be drawn between N. harveyanum and N. miil- 

 tilohum. It is desirable, however, to point out here some 

 of the differences existing between N. harveyanum and cer- 

 tain forms of N. riipr echtianiim . There is enough of simi- 

 larity between certain variations of the latter species and 

 N. harveyantim to give reason for the suspicion that the 

 two are identical. The examination of a good range of 



