04 — Rhodora [APRIL 
inflorescences, both male and female. In Clevea and Sauteria the 
antheridia are borne in irregular and poorly defined groups on the 
upper surface of the thallus and are not surrounded by protective 
scales. In Peltolepis the antheridia are collected in definite disc-like 
inflorescences surrounded by scales. In Clevea the stalk of the carpo- 
cephalum arises from the upper surface of the thallus and is quite 
destitute of longitudinal grooves enclosing rhizoids. In Sauteria 
and Peltolepis the stalk arises from the end of a thallus-branch; in 
Sauteria there is one rhizoid-bearing groove present and in Peltolepis 
two. These differential characters indicate that Clevea occupies the 
lowest place in the Astroporae from the standpoint of phylogeny and 
Peltolepis the highest. 
The thallus in Clevea hyalina is smaller than in most of the New 
England Marchantiaceae, averaging about 3 mm. in width. The 
upper surface is typically green, sometimes with a glaucous cast, 
but the margins in some cases at least are bordered with purple. The 
boundaries of the air-spaces show clearly under the lens. The ventral 
scales are large and conspicuous and extend beyond the margin of the 
thallus. At the apical extremity they form a distinct cluster extend- 
ing backward over the growing point. The scales are pointed and 
are either white and hyaline throughout or else more or less tinged 
with purple. These scales form one of the most characteristic features 
of the species and are often of great service in the determination of 
sterile material. 
2. NEESIELLA RUPESTRIS (Nees) Schiffn.; Engler & Prantl, Nat. 
Pflanzenfam. 15: 32. f. 17, G-K (after Bischoff). 1893. On a lime- 
stone-bearing cliff, Willoughby Mountain, Vermont (Miss Lorenz & 
A. W. E., July, 1913). New to New England but already known, in 
North America, from Quebec, Ontario, New York, Ohio, and Illinois. 
Also known from various parts of Europe and from Japan. Since 
the most important characteristics of the species were described by the 
writer in the Bryologist for September, 1911, it will not be necessary 
to repeat them here. The Vermont material is not abundant. It 
grew in localities similar to those described under Clevea hyalina, and 
the two species were occasionally mixed. Unfortunately the few 
carpocephala collected were so old and weathered that the united 
spirals of the elaters, first noted by Schiffner, could not be clearly 
demonstrated. The specimens lacked, however, the abundant scales 
AN" moli c d ipm 
A ue 1 RT E 
