Beiblatt zu den Botanischen Jahrbüchern. Nr. 70. 19 
Zona vegetalionis — Vegetation zone. 
Provincia — Province. 
Regio — Region. 
Districtus — District. 
Statio — Station. 
Vegetatio — Vegetation. 
Tegmen vegetale — Vegetative covering, floral covering. 
Dominium (regnum; — Domain (Hylophytie, Poophytie, Eremophytic). 
Series Series (Hydrophytie, Mesophytie, Xerophytie). 
Formatio — Formation. 
Typus — Type. 
Facies — Facies. 
Zonula — Formational zone. 
Stratum — Layer. 
Aspectus — Aspect. 
Area — Patch (-etum). 
Species’ principalis — Principal species. 
Species secondaria — Secondary species. 
Symmetria topographica — Topographical symmetry. 
Radialis-bilateralis-unilateralis. 
Asymmetria topographica — Topographical asymmetry. 
Associatio — Association. 
Coordinatio — Coordination. 
Subordinatio — Subordination. 
Zonatio — Zonation. 
Zonatio radialis — Radial zonation. 
Zonatio bilateralis — Bilateral zonation. 
Zonatio unilateralis — Unilateral zonation. 
Azonatio — Azonation. 
Successio — Succession !). 
Alternatio — Alternation !). 
Stabilisatio: — Stabilisation. 
Migratio — Migration. 
Invasio — Invasion. 
Proximitas — Proximity. 
Adaptabilitas — Adaptability. 
Obstructio — Obstruction. 
Obex — Barrier. 
Conductio -— Conduction. 
Distributio — Distribution. 
Pressus — Pressure (forward pressure, tension). 
1) Tuorxper, J. J., The Prairiegrass Formation in Region I. Rep. Bot. Surv. Nebr. 
5:55. 4901. 
b* 
