Apbil 29, 1910] 



SCIENCE 



653 



BOTANICAL, GARDEN AT HOMEWOOD 

 Chief Gboxips in the Gabden 

 Section I. Vegetative Obgans. 

 Division I. Roots. 1-15. 



Subdivision I. Subterranean Roots. 

 " II. Aquatic Roots. 



" III. Aerial Roots. 



" IV. Parasitic Roots. 



Division II. Stems. 16-38. 

 Subdivision I. Leafless Stems. 

 " II. Foliage Stems. 



" III. Branch Systems. 



Division III. Leaves. 39-113. 

 Subdivision I. Cotyledons. 



" II. Foliage Leaves. 



Section II. Repeoductive Obgans. 



Division I. For Vegetative Propagation. 200- 

 208. 

 " II. For Asexual Reproduction. 209- 



214. 

 " III. For Sexual Reproduction. 215- 

 313. 

 Subdivision I. Sexual Organs. 



" II. Accessory Reproductive Or- 



gans. 

 Section III. Plant Relationship. 



Division I. Degrees of Relationship. 400-409. 

 " II. History of Classifications. 410- 

 545. 

 Subdivision I. System of Aristotle. 

 II. " " Ray. 

 " III. " " Linnseus. 



" IV. " " de Jussieu. 



" V. " " de Candolle. 



" VI. " " Brongniart. 



" VII. " " Braun. 



" VIII. " " Eichler. 



" IX. " " Engler. 



Division III. Selected Families. 546-571. 

 Section IV. Economic Plants. 



Division I. Useful Plants. 600-618. 



II. Ornamental Plants. 619-652. 



and systematic sequences to be illustrated 

 in a set of formal beds, we encounter at 

 once the very practical difficulty of making 

 plants grow in proximity in the garden 

 that occupy quite different habitats in 

 nature. Under these conditions one is 

 tempted to do what one of my correspond- 

 * This page is reprinted from " Guide to the 



Outline of the Types of Plant Obgans, of 

 Plant Relationships and of Economic 

 Plants Illustbated in the Gabden* 

 Section I. Vegetative Obgans. 

 Division I. Roots. 



Subdivision I. Subterranean Roots. 



1 Tap Roots. 



2 Fascicled Roots (clustered roots). 



3 Fibrous Roots. 

 Subdivision II. Aquatic Roots. 



4 Bottom Roots. 



5 Floating Roots. 

 Subdivision III. Aerial Roots. 



6 Prop Roots. 



7 Protective Roots (root-thorns). 



8 Tendril Roots. 



9 Attaching Roots (of air plants). 



10 Attaching and Absorbing Roots (of air 

 plants). 



Subdivision IV. Parasitic Roots. 



11 Water-absorbing Roots. 



12 Food-absorbing Roots. 

 Subdivision V. Symbiotic Roots. 



13 Mycorhizal Roots (with fungus threads in- 

 stead of root hairs ) . 



14 Bacterial Roots (with bacterial tubercles). 



15 Nostoc-holding Roots. 

 Division II. Stems. 



Subdivision I. Leafless Stems (t. e., with 

 scale-like leaves). 



A. Subterranean Stems. 



16 Rhizomes. 



17 Tubers. 



18 Corms. 



19 Bulbs. 



B. Aerial Leafless Stems. 



20 Cactoid Stems ( fleshy green stems ) . 



21 Phyllocladia (leaf-like stems). 



* All types illustrated in the garden are indi- 

 cated in this list. Each type is given a number 

 here, which also will be on the top of the label 

 of every species used to illustrate that type.' 



ents has done— t. e., rearrange the families 

 of plants in such a way that families with 

 like habitat-requirements come near to- 

 gether. This correspondent, a landscape 

 gardener, points out the horticultural in- 

 conveniences of the Engler system, and 

 suggests that the Eichler, and Bentham and 

 Botanical Garden at Homewood." 



