16 Beiblatt zu den Botanischen Jahrbüchern. Nr. 70. 
IV. Names of Particular Formations (Types), illustrating the 
construction of formational polynomials. 
Phragmites-Seirpus-Typha-helium — The reedgrass-rush swamp formation. 
Phragmitetum, scirpetum, typhetum, the area or patch characterised or 
controlled by Phragmites, Scirpus, or Typha. 
Primula-Polemonium-Oxyria-phellium — The primrose rock cleft formation. 
Primuletum, polemonietum, oxyrietum. 
Betula-Salix-helolochmium — The birch-willow meadow thicket formation. 
Betuletum, salicetum. 
Paronychia-Silene-chalicodium — The mat gravel slide formation. 
Paronychietum, silenetum, arenarietum. 
Carex-Sieversia-Polygonum-coryphium — The sedge-smartweed alpine 
meadow formation. 
Caricetum, sieversietum, polygonetum. 
Quercus-Ulmus-Juglans-hylium — The buroak-elm-walnut forest formation. 
Populus tremuloides-hylium — The aspen forest formation. 
Sporobolus-Koeleria-Festuca-Andropogon-psilium — The prairiegrass prairie 
formation. 
Potamogeton-Sparganium-Utricularia-limnium — The alpine lake formation. 
Deschampsia-Poa-Agrostis-poium — The bluegrass-redtop meadow formation. 
V. Names of Vegetation Forms and Habitat Forms. 
Vegetation forms!). 
I. Lignosae (sc. plantae) — Woody plants. 
Arbores — Trees. 
Frutices — Shrubs. 
Suffrutices — Undershrubs. 
Dumi — Bushes. 
Subdumi — Dwarf shrubs. 
Scandentes — Climbers and Twiners. 
Il. Fruticuli — Half Shrubs. 
Ill. Herbae — Herbs. 
Pleiocyclicae (se. herbae) — Pleiocyclic Herbs. 
Hapaxanthae — Hapaxanthous Herbs. 
Rosulae — Rosettes. 
. Mattae — Mats. 
Succulentes — Succulents. 
Serpentes et Scandentes — Creepers and Climbers. 
4) Poux» and CuEwENTs, Phytogeography of Nebraska I. 2. ed. 9, 95, 1900 
