BRIEFER ARTICLES 455 
_ Allfour of these species appear to occupy their clifi-side stations rather 
ae the latter are somewhat free from other competing shrubs than 
ag here is found an ideal environment. Indeed, the Artemisias and 
the Inula in good soil have a robuster habit and more abundant foliage 
. fan along the faces of the tufa cliffs where their presence is most char- 
acteristic. 
Summing up the results of the observations made upon the nine species 
ii i 
dalt with in this paper, the members of this flora may be classed according 
their qualifications to endure high temperature with deprivation of 
_ Water as follows: 
icculents, extremely resistant . . - 
Mesembryanthemum acinacijorme 
{ Opuntia Ficus-I ndica 
Uni os \ 
“unjured by drought, retaining all foliage Matthiola rupestris 
Summer deciduous, highly resistant . S pore junceum 
Medicago arborea 
Artemisia arborescens 
~ 
: 
ea found in large numbers, and a few gametop 
Leaves 
a branches often dying in situ, | Artemisia variabilis 
erately resistant Pee Ke Helichrysum rupestre 
Inula viscosa 
—J. Y. BERGEN, Naples, Italy. 
A NEW GENUS OF OPHIOGLOSSACEAE. 
se (WITH ONE FIGURE) Paes 
4 a the spring of 1903 the writer discovered the gametophytes 
of the un obliquum Muhl., and later announced the fact in a catalogue 
eit pteridophytes of Minnesota. Since that time both sporophyte and 
oe of this and other species of Botrychium have been subjected 
be 1 study. The gametophytes of Botrychium virginianum have 
jolium were found in 1904. While 
pe question now being agitated by ot 
“ate alli ug has disputed BowER’s contention 
from th to the Lycopodiales. CAMPBELL WO 
| fhe Bryophyta. 
destitut gametophytes of Botrychium obliquum 
: € of chlorophyll. They grow by @ disti 
m are subterranean and 
net apical meristem, are 
ES r Mi 
Inn. Bot. Studies 3:249. 1903+ 
3 , 3 
ee) American Naturalist 38:761-775- 1904; (2) ibid. 39:273-285- 1905- 
