488 TRANS. OF THE ACAD. OF SCIENCE. 
tached to the living plant, but — = vitality. The 
buds are si short and ascending in the cespitose species, 
acuminatus, etc. in the aldoniig ones then form shorter or 
longer stolons, — (J. falcatus, J. pheocephalus) or fleshy 
(J. scirpoides), and often bearing a bunch of leaves at their 
; in J. nodosus the stolons form thin fibres, which bear lit- 
tle bulbs, and often a series of them, the source of the stems 
of next season (see Herb. norm. 74, where in many specimens 
the old withered stolons with the vestiges of the decayed 
stems of last season and the new ones can be seen). The 
where the internodes are short, they become cespitose, where 
they are long the plants are called creeping; difference in 
1 and moisture, however, seem pene md to influence 
the length of hn internodes in the same spec 
Pag. 427. or “J, pallescens,” ree that name is used 
for one of our sa i ead J. acuminatu r “var. frater- 
,” var. legitimus ; for ma. Buckley a leptocaulis ; and 
for “J. saginoides,” J. triformis, var. & 
Pag 
be cancelled. 
n J. pelocarpus and J. acuminatus the viviparous buds are 
_ result of retrograde metamorphosis ; in other cases they 
be produced by insects, eae are then much larger de- 
potas ations, 
ag. 430. It is evident, that _ sculpture of the seeds is 
the result of the structure of both the epidermis and the next 
inferior layer of cells, which mee together — Zigemea 
ore 
of the sels sn seem, anaes, to cause the ma kine des- 
ignated by me as “levissime irregulariter reticulata” (p. 432, 
