SYNOPSIS OF THE GENEKA OF CONIFERS. 73 



GlyptOStrolwS, 26. Leaves scattered; cones oblong; 

 scales leathery, unequal. 



SUB-OKDER III. THE YEW SUB-FAMILY. 



Fertile aments solitary, without an ovary or carpellary 

 scale, and ripening into a drupaceous fruit. Buds scaly. 



A Flowers dioecious. * Leaves persistent, linear, or needle-shaped. 



TaXUS (YEW.) 27. Seeds nut-like, erect in the centre 

 of an open, fleshy disk; anthers 8-celled. 



Torre ya, 28. Seeds large, ovoid, and without a fleshy 

 disk ; anthers 4-celled. 



Cephalotaxus. 29. Seeds similar to Torreya, but the 

 fruit in clusters; anthers 3-celled. 



PodocarpllS, 30. Leaves mostly 1-nerved ; seed with 

 a fleshy integument, inverted and attached to thick, fleshy 

 stalks. 



* * Leaves persistent, scale-like or needle-shape. 

 Dacrydium, 31. Seeds with a hard, bony covering, 



erect in a fleshy, disk-like integument. 



* * * Leaves deciduous, fan-shaped. 



Salisburia. 32. Seeds large, with a fleshy disk closely 

 surrounding their base ; anthers 2-celled. 



B Flowers monoecious. * Leaves persistent, scale-formed. 



PhyllOCladus, 33. Branchlets flattened and leaf-like; 

 seeds small, nut-like, and partly enclosed at the base by a 

 fleshy disk ; anthers 2-celled. 



Microcachrys. 34. Leaves in opposite pairs ; seeds 

 erect with a thin, dry, membranaceous covering. 



* * Leaves persistent, linear, and flat. 



Saxc-Gothea. 35. Leaves alternate, two-rowed, or 

 scattered ; base of the seeds enclosed by a thin membra- 

 naceous integument. 



* * * Leaves persistent, opposite, elliptical or lanceolate, nerveless. 

 Nageia. 36. Sometimes dioecious ; seeds with a thin, 



bony shell, and enclosed by a fleshy or leathery covering. 

 4 



