CLASS XX. ORDER XVI. Ill 



strobile roundish, fe\v-flo\vered. — Leaves solita- 

 ry, SCALES OF THE CONE SMOOTH AND TAPERING. 



— bahameay (balsam fir) leaves flat emarginate.— 

 canadensis', (hemlock tree) leaves flat denticulate 

 two ranked — alba^ (single spruce) leaves 4-sided 

 incurved, strobile sub-cylindric with obovate scales. 

 — yiigra^ (double spruce) leaves 4-sided strait erect, 

 strobile ovate with oval scales. 



CupREssus; Staminate flowers — anient imbri- 

 cate : calyx a scale : corol : anthers 4, sessile. 

 Pistillate flowers — ament strobilaceous : calyx a 

 1 -flowered scale : corol : stigmas 2, with con- 

 cave points : nut angled. 51. 100 — thyoides {\y\\\\.Q 

 cedar) branchlets compressed and covered with 4 

 imbricated rows of short leafets, cones minute and 

 angular. \i . 



Thuja. Staminate flowers — ament imbricate : 

 calyx a scale : corol : anthers 4. Pistillate flow- 

 ers — ament a strobile : calyx a 2-flowered scale : 

 corol : nut 1, surrounded with a marginal wing. 

 51. 100 — occidentalis (arbor vitaef) branches spread- 

 ing, cones smooth with obtuse scales. \ . 



AcALYFHA. Staminate flowers — calyx 3 or 4- 

 leaved : stamens 8 to 16. Pistillate flowers — calyx 

 and corol like the staminate : styles 3, 2-cleft : 

 capsule tricoccous, 3-ceIled. (Having large bracts.) 

 38. 9 5 — -oirginica^ (three seed mercury) leaves 

 lance oblong. 0. 



RiciNus. Staminate flowers — calyx 5-parted : 

 stamens numerous. Pistillate flowers — calyx 3- 

 parted : styles 3, 2-cIeft : capsules echinate, 3- 

 celled, 3-seeded. 38. 96 — cowmw?^^ (palma-christi, 

 or castor oil plant) leaves palmate peltate. 0. e. 



Phyllanthus. Staminate flowers — calyx 5 or 



J This tree is also called white cedar in Dr, Hosack's ca- 

 talogue : to which and to Phelps' Calendar, we generally re- 

 fer, as til standards for English names. 



