― 2l8 ― 



and the smaller. The larger scars indicate the insertions of already 

 dropped fertile leaves, while the smaller, of the sterile, that is " in- 

 ternodiale Haare ，， of し ramer. The rin^^s of the smaller scars stand 

 near to the upper larger ones, and the larger and smaller ones come- 

 in the rep"ular alternation. The number of scars in each ring of both! 

 sorts is not definite according to the position and thickness of the 

 stem, but in general that of scars in the larp^er ones is always a little 

 more numerous than that of those in the smaller, it amountinor from 

 some 1 2 to 15 or more in the bared portion. 



In the pTowino- portion of frond the sterile leaves that is hairs are 

 seen, as in the her, 2, at 4th (between j and 4 in the fig.) and 6th 

 node (between 4 and 5), from the apex, while those standing on the 

 upper 3 (/-j) nodes are all young fertile leaves. Below the 6th node,, 

 the sterile leaves are usually cleijenerated and the most part of them 

 is decayed off, as it is illustrated in J. A?-. I.e. fip-. 4, ん They are,, 

 when perfect, 3-4 times polychotomous with 4-5 cylindrical cells at every 

 segment, which gradually decrease in thickness upward. A full grown- 

 hair has at the base a short pedicel with a smaller cell sometimes at- 

 tached to it, which may be considered as another rudimentary hair. 



1 he fertile leaves, which are entirely free from each other, are 

 much longer and larger than the sterile, and full of chlorophyll grains.. 

 丄 hey are differenciatecl, near the base, by a slight constriction, into 

 a short pedice レ like portion (the " Basilarwurst " of Cramer) and 

 scimiter-shaped body. The latter is a sack which is not terete, but 

 more or less compressed, and especially so in the median portion. It 

 is slightly curved outward facing the concave side to the stem, and 

 thickenes at the apex into a short spine which is slightly bent out- 

 ward, that is turned away from the stem. When young, the scimiter 

 like portion is almost cylindrical, oeinp- attenuated above and sHp-htly 

 curved. The number of fertile leaves in a whirl amounts to 20 or" 



