82 DUDLEY MEMORIAL VOLUME 



The Coniferse are the prevailing Gymnosperms of the present geological 

 age. They are represented by two families and about forty genera. 

 Fruit composed of a solitary stone surrounded by a fleshy, greenish or bright 



red aril. 1. Taxacea. 



Fruit a woody cone made up of scales, each of which bears 1 -several seeds in 



its axil (scales coalescent and fleshy in Juniperus). 



2. Pinacea. 



1. TAXACE^E. Yew Family. 



Trees or shrubs with durable close-grained wood. Leaves flat, linear 

 or broader, usually 2 -ranked by a twist of the compressed petioles, decur- 

 rent on the branchlets. Flowers dioecious, axillary; staminate composed of 

 many stamens; ovulate of a single erect ovule. Fruit a stone more or less 

 enclosed by a fleshy aril-like disk. 

 Fruit drupe-like; aril completely enclosing stone. 



Leaves broadly lanceolate; pollen-sacs 2. 1. Podocarpus. 



Leaves linear or nearly so; pollen-sacs 3-4. 



Flowers pedunculate, clustered in heads; pollen-sacs 3. 



2. Cephalotaxus. 

 Flowers axillary; pollen-sacs 4. 3. Torreya. 



Fruit with a bright red cup-shaped aril partly enclosing the stone. 



4. Taxus. 



1. Podocarpus. 



Trees or sometimes shrubs with linear or lanceolate alternate or oppo- 

 site evergreen leaves. Fruit drupe-like, borne on a thickened foot-stalk; 

 seeds inverted. 



A genus of over 40 species, chiefly in the tropics and substropices of the 

 southern hemisphere. Many species are valuable timber trees. 



1. Podocarpus macrophylla Don. 



Leaves alternate, lanceolate, sometimes falcate, 2-5 inch long, about 

 Y-2. inch wide, bright green and lustrous above, pale beneath; fruit greenish, 

 on a thickened purplish foot stalk. 



One specimen, planted by Professor Dudley, is on the lawn at 8 Al- 

 varado Row. 



2. Cephalotaxus. 



Leaves linear, acute and often sharp-pointed, spirally arranged but usu- 

 ally appearing 2-ranked. Flowers dioecious, pedunculate, clustered in small 

 heads. Fruit drupe-like ; endosperm uniform. 



