858 Henderson : New Plants from the Northwest 



that, but on account of generally longer pedicels and longer and 

 more acuminate leaves, I propose it as 



Smilacina stellata sessilifolia 



Differs from the type in rather longer pedicels and in most cases 

 in longer and more acuminate leaves. 



y Isoetes Bolanderi Sonnei 



Differs from the types as described by Engelmann in shorter, 

 more rigid leaves, apparent absence of stomata, almost orbicular 

 macro-sporangium spotted with small dark spots, and in the wide 

 velum which covers from y^ to 2 /$ of the sporangium. 



Sent to me in 1887 by Mr. C. F. Sonne, who collected it in 

 Donner Lake, California, in October of that year. 



Were it not that the velum has been found by me to be a very 

 variable and untrustworthy character in this genus, varying as it 

 does in this plant from y^ to 2 /^ the width of the sporangium, and 

 in /. nuda, I. Hozuellii, and /. Undenvoodi to such an extent as to 

 make me credit the statement of Mr. A. A. Eaton, that they are 

 all one species, I should be inclined to think this a species distinct 

 from /. Bolanderi. 



Type in my private collection ; co-types distributed to un- 

 known parties. 



s 



Isoetes occidentalis 



Trunk bilobed : plant always submerged, without stomata : 

 leaves few in small plants, 40-60 in large forms, spreading, rigid, 

 tapering, quadrangular, acute or acuminate, not contracted above 



o- 



in the same plant, or merely 5-6 cm. in the smaller : ligule nar- 

 rowly triangular : velum covering about l /$ the sporangium : ma- 

 crospores 400-450 /i, finely crested with simple or confluent crests, 

 or even mere prominences : microspores 30 ft long and very 

 papillose to echinulate. 



In a foot or two of water, but never emerging. Lake Coeur 

 d'Alene, Idaho, August-Sept., 1897. No. 4786. Type in my pri- 

 vate collection and in the herbaria of Columbia, Harvard and 

 Idaho Universities. 



This plant, or something extremely like it, exists in nearly all 

 the lakes in the Northwest. It has been referred to /. laeustris, 



