ALABAMA FLORA AND EUROPEAN FLORA. 43 
EUROPE AND THE MEDITERRANEAN REGION, 
The relationship between the flora of Alabama and that of Europe 
and the parts of Asia and Africa bordering upon the Mediterranean 
Sea is indicated by their having in common about 100 families with 
about 230 genera, this being nearly 35 per cent ot the genera indig- 
enous to Alabama, with 55 species which occur in Alabama and also 
in western Europe and in the Mediterranean region, chiefly the former. 
Of the arboreal plant formation nearly all of our deciduous catkin- 
bearing trees and most of the shrubs are represented by closely allied 
species in those regions. . Some of these genera are represented far to 
the north in the European-Asiatic forest belt, such as willow, cotton- 
wood (Populus), birch and alder, and pine, while walnut, beech, oak, 
hornbeam, hazelnut, ash, maple, plum and cherry, pear and apple, and 
the savin are widely diffused over the more temperate regions of 
Europe. In the Mediterranean region our white cedar (Chamaecy- 
paris) finds itself represented in the cypress (Cupressus), from which 
it differs by a mere technical character, and Celtis (hackberry), Cercis, 
and Storax are represented in the same region. It is a remarkable fact 
that in no one of these genera is the European species identical with that 
found in Alabama. The ferns and allied families are represented by 
4 families with 12 genera; of these 7 belong to the ferns proper with 
5 identical species, 2 to the Ophioglossaceae, 1 to the Lycopodiaceae, 
1 to the Selaginellaceae, and 1 to the Equisetaceae. 
The following table exhibits the relation of these two floras: 
Genera and species common to Alabama and Europe, with Mediterranean Asia and Africa. 
Number | Number : Number | Number 
Classification. of of Classification. of of 
genera. | species. genera. | species. 
Pteridophyta: Dicotyledoneae: 
Filices? ns ayuleiataale wn antamcurests 7 5 Archichlamydeae— 
Ophioglossaceae. Di cai. Searee. Ranunculaceae. ..... 13 5 
Lycopodiaceae .. TL leweaen — Rosaceae$ naa. 
Selaginellaceae. . 1 |..--eee eee Apiaceae .. A 9]. 
Equisetaceae ..... 1 sapeemeisets Brassicaceae . 8 
oe a ae $ 3 2 
tal eisisscpietcaeeended 12 5 etulaceae p oe 
= Alsinaceae 3 5 1 
Monocotyledoneae: Chenopodiaceae. .... 4 2 
PORCORG cuss vennus cannes 20 4 Fagaceae .........--- BF | ewserasanc 
Orchidaceae. Bi lective sie Urticaceae.... : big pees 
Cyperacene.... 5 5 Onagraceae .. a 3 2 
Najadaceae? .. 4 7 Salicaceae......-..-- 2, | sistccininrargte 
Liliaceae’ ..... 4) weeesnece Aristolochiaceae .... 2: | earexayetsen 
Alismaceae.. 2 1 Polygonaceae .....-- 2 3 
Lemnaceae.. 2 3 Nymphaeacene...... BD! | aes see dpa si 
Juncaceae... 2 3 Crassulaceae* ....... 2 1 
Typhaceae .... 1 2 Saxifragaceae 2 |. a 
Sparganiaceae. AL. sl inasecterceataisse Juglandaceae L |. 
allisneriaceae 1 1 Myricaceae 1}. 
Scheuchzeriace Lo lnseces see Moraceae... : 1. |. oe 
Araceae ... 1 1 Ceratophyllaceac. -.. 1 1 
Tridaceae. . dS eceecace Fumariaceae ........ a eee 
Eriocaulaceae 1 1 Droseraceae® ........ 1 1 
Platanaceae......--- alt seme 
TOUT ce misvesinnegeseeer 54 28 Oxalidaceae.......-. 1 1 
Linaceae .......-.-.. ce here 
1Including Polypodiaceae, Hymenophyllaceae, 8 Here used in the broader sense. 
and Osmundaceae. 4 Tillaea. 
2Including Potamogeton, 5 species. 6 Drosera. 
