Studies in the Quantitative Morphology and Ecology of Eriophorum Angustifolium Roth: I. The Rhizome System

III. ANATOMY . . . . . . . . . . . . 297 (a) The rhizome . . . . .. 297 (b) The stock . . . .. 297 (c) The transition from rhizome to stock .. . 298 (d) The vertical rhizome . ... 298 IV. QUANTITATIVE MORPHOLOGY OF THE RHIZOME ..... 299 (a) The effect of position on rhizome measurements . 299 (b) Tussocking . . . . .. 300 (c) Phase development . . . . . . . . . 301 (d) The internode curve . . . . . . . . . 302 V. DISCUSSION OF RHIZOME MEASUREMENTS ....... 303 (a) Mean rhizome length ..... 304 (b) Tests of significance . . . .. 306 (c) Partial correlations within rhizome classes . .. 306 (d) Mean maximum internode length: mean rhizome diameter . . 308 (e) Mean internode number .... . 308 (f) The percentage occurrence of rhizome classes .. 309 (g) Conclusions from individual rhizome measurements: rejuvenation .310 (h) Variability of rhizome measurements .. . 312 VI. ENVIRONMENT . . . . . . . . . . . 313 (a) Moisture . . . . . . . . . . . 313 (b) Light . . . ... 313 (c) Temperature . . . . . . . . . . 314 (d) pH and mineral nutrients . . . . . . . . 314 VII. EXPERIMENTAL EVIDENCE .. . . . ....314 (a) Experiment on the effects of soil moisture .....314 (b) Experimient on the effects of gravity . . . . . . 315 VIII. VERTICAL AND ABNORMAL RHIZOMES . . . . . . .316 IX. SUMMARY . . . . . . . . . . . . 317 REFERENCES . . . . . . . .. 318