tween Camjjtosorus rliizophyllus, the Walking fern, ancl Aspl&n/ium 
platf/neuron, the Ebony spleenwort, and to be expected to occur 
sparingly where these ferns grow in proximity. Some of those 
who have access to living plants of this species should test the fer- 
tility of its spores. Distributed throughout the United States east 
of the Mississippi river, but very rare in New England. One or two 
plants have been found near Canaan, Conn., Adam. August. 
Illustrated in Eaton’slFerns of N. A., Yol. 1, and »by Meehan, 
Series n, Vol. 1. 
90. A. platy neuron (L.) Oakes ( A. ebeneum.) Ebony 
Spleenwort. Fronds 5-20 inches long, erect; laminae once pin- 
nate ; pinnae mostly alternate, lanceolate, £-1 inch long, auricled 
at the base ; stipe and rachis lustrous brown Dry rocky soil, often 
in company with Red Cedar (Juniperus Virginiana ) Common. 
Middle of August. North America east of the Mississippi. 
Illustrated by Meehan, Series 1 , Yol. 1. 
93. A. Trichomanes L. Maidenhair Spleenwort. Tuft- 
ed. Fronds numerous, 3-6 inches long, spreading, simply pinnate ; 
pinnae mostly opposite, roundish and small ; stipe and rachis lus- 
trous black. Evergreen. Shaded ledges,. ^either calcareous or 
granitic. Rather frequent, but becoming rare in the neighborhood 
of large cities. Middle of August. Distributed throughout the 
world . 
Illustrated by Meehan, Series 1 , Yol 2. 
94. A. Trichomanes incisum. Laminae broader; pinnae 
sometimes much incised. Norwich, Vt , Prof. Jessup • Brattle- 
boro, Vt. 
A. Trichomanes under cultivation often takes on incisecf pinnae 
sometimes to a very marked degree, perhaps caused by growth in 
a stronger light, as is the case- with variety incisa of the common 
Christmas fern. It may be expected perhaps in localities where 
this fern is abundant and its shade has been removed by the wood- 
cutters. Fine plants of this variety occur on the Pacific coast. It 
is also native to Great Britain 
