[38]. The Origin of Species, 186. 1859.
[39]. Rocks, Rock-weathering, and Soils, 300. 1897.
[40]. Relation d’un Voyage du Levant. 1717.
[41]. Clements, F. E. The Development and Structure of Vegetation. Rep. Bot. Surv. Nebr., 7:163. 1904.
[42]. Clements, F. E. The Development and Structure of Vegetation, 24, 27. 1904.
[43]. Clements, F. E. A System of Nomenclature for Phytogeography. Engler Jahrb., 31:b70:1. 1902.
[44]. The terms, oceanad, hylad, poad, eremad, etc., are proposed in place of oceanophyte, hylophyte, etc. They are much shorter and make consistent groups under the general term, ecad., i. e., habitat form.
[45]. Clements, F. E. The Development and Structure of Vegetation, 166. 1904.
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