Nov., 1913.] 
The Classification of Plants, X. 
203 
SYNOPSIS OF THE LEPIDOPHYTA. 
I. Sporophyte homosporous; leaves without a ligule. 
Lycopodie.e, LYCOPODIALES. 
1. Sporangia unilocular; sporophylls undivided, lycopodiace.e. 
a. Stems branched, with numerous leaves. Lycopodium. 
Note—The lower species are without terminal cones 
but with zones of sporophylls alternating with sterile 
foilage leaves, the higher have definite terminal cones. 
b. Stems unbranched with a few basal leaves and a small 
cone at the tip of a naked peduncle. Phylloglossum. 
2. Sporangia bilocular or trilocular; sporophylls two-parted. 
PSILOTACE/E. 
a. Leaves numerous, rather large and spreading, with a 
definite midrib; sporongia with two cavities. 
Tmesipteris. 
b. Leaves small and rather distant without a definite mid¬ 
rib; sporangia with three cavities. Psilotum. 
II. Sporophyte heterosporous; leaves with a ligule. selaginelle.e. 
1. Without increase in thickness of stem, herbs. 
SELAGINELLALES, selaginellace.e, Selaginella 
2. With increase in thickness of stem, fossil trees. SIGILLARIALES. 
a. Leaves spirally arranged, but the b,ark without parallel 
vertical flutings or ridges. 
lepidodendrace/e, Lepidodendron, etc. 
b. Leaves spirally arranged, but the bark with parallel, 
vertical flutings or ridges, the leaf-scars thus appearing 
in vertical rows. sigillariace^e, Sigillaria, etc. 
Note—Several other imperfectly known families belong 
to this order. 
Britton and Brown’s Illustrated Flora —The appearance of the 
second edition of Britton and Brown’s Illustrated Flora marks 
another stage in the progress of American systematic botany. 
The revision was made at an opportune time and has been well 
carried out to meet present conditions. A commendable conser¬ 
vatism is shown quite generally throughout the work in disregard¬ 
ing trivial variations and fluctuations. Much improvement is also 
shown in some new illustrations. 
The ‘’Illustrated Flora” will be indispensable to every working 
botanist in the region covered. It will be the book to which one 
will go for the final solution of difficult systematic problems. It is 
the desire of the reviewer that this manual shall be taken as the 
standard reference for practical work on the local flora, and the 
numerous plants submitted from various sources throughout the 
state will be referred to its nomenclature. In this way alone will 
confusion be avoided. 
The present work appropriately follows the rules of priority 
disregarding the legislation of recent European congresses, which 
were after all not true representative bodies of the botanists of 
the world. Had the recent congresses been held in New York or 
on the Pacific coast the results, would no doubt, have been differ¬ 
ent. Strict priority will in the end give more uniform results than 
