Jan., 1918. Annual Report of the Director. 171 



large Castor-bean plant in full leaf, flower and ripe fruit; associated 

 w4th enlarged models of a male cluster and female fiower in section and 

 a transverse section of the ovary. The Waterlily Family: a strikingly 

 natural portion of a "Lotus bed" comprising life-size leaves in all 

 stages of expansion, developing flower-buds, fruits and fully expanded 

 flowers. The Mahogany Family : a natural-size branch of the Mahogany 

 tree in full leaf and ripe fruit. The Dog's-Bane Family: a complete 

 natural-size top of an Oleander bush with three branches in full flower 

 and one in ripening fruit; associated wdth this is an enlarged flower of 

 the Dog's bane sectioned to reveal the peculiar arrangement of the 

 essential organs, and a transverse section of the ovar>'. The Blue- 

 Green Algae: a model, in glass, of Nostoc (highly magnified) and a sim- 

 ilarly produced model of Rivularia. The Green Algae: a complete 

 natural-size reproduction, in glass, of a species of Caulerpa. During the 

 period of production of the above the following reproductions and 

 models were in process and are now nearing completion : A natural-size 

 plant of Poison Ivy, in full leaf and flower, and an autiimnal branch in 

 full ripe fruit and colorate leaf; a large portion of a Trumpet-creeper 

 vine in full leaf, flower and fruit; the terminal portion of a Bittersweet 

 vine in full autumnal foliage and ripe fruit and a small branch in flower; 

 a large branch of Witch-hazel in autumnal foliage, ripe fruit and flower; 

 a large branch of the Sassafras tree in full leaf and fruit; and a complete 

 male plant of Nepenthes in leaf, pitcher and flower. Accessory repro- 

 ductions of specialized fruits, \\dth a leaf or two attached to the stems, 

 are produced as opportunity offers. Of these the Cocoon Fruit (Fevillea), 

 of the Melon family, has been flnished and installed; and the peciiliar 

 fruits of the Sausage Tree and the Wax Candle tree are in process. 

 All the reproductions and models are made from living plants only and 

 are fabricated from such materials as are permanent and will best 

 simulate the transparency, freshness and texture of each special organ. 

 In order that the full character of this work may be comprehended in 

 this connection a recapitulation of the work accomplished previous to 

 Mr. Field's contribution for the maintenance of the Section, may not 

 be out of place in this report. The other plant families now represented, 

 aside from the above, are: The Orchid Family: a complete, natural- 

 size Vanilla vine, in ivll leaf, flower and mature fruit, accompanied by 

 a large Cattleya flower and enlarged essential organs; The Milkweed 

 Family: a complete, natural-size plant of the common Milk- weed in 

 full leaf, fruit and flower-heads, accompanied by an enlarged flower, 

 stamen, and a leg of a fly carrying a pollen sac; The Gingko Family: 

 a large, natural-size branch of the Maidenhair tree in full leaf and ripe 

 fruit. The Horsechestnut Family: a large branch of the Buckeye in 



