436 CONIFERS. (PINE FAMILY.) 



bricated. ( Cupressus disticha, L. } Ponds and deep swamps. Florida, and 

 northward. Feb. and March. A very large tree, with pale smoothish bark, 

 light durable wood, and few fastigiate branches at the summit. Leaves 4" - 6" 

 long. Cones |' - 1' in diameter. Attached to the roots are hollow conical knobs 

 called Cypress-Knees. 



6. THUJA, Tourn. ARBOR-VIT.E. 



Flowers monoecious. Aments small, terminal. Anther-cells 4, with a scale- 

 like connective. Carpellary scales imbricated in four rows, with two erect ovules 

 at the base. Cone oblong, the few scales imbricated, expanding at maturity, 

 persistent. Seed winged. Cotyledons 2, oblong. Trees or shrubs, with scale- 

 like imbricated persistent leaves. 



1. T. OCCidentalis, L. (ARBOR-VIT^E.) Branches flat, distichous ; leaves 

 ovate, obtuse, with a gland on the back, imbricated in four rows ; cones oblong, 

 nodding, with the outer scales oblong, obtuse ; seeds broadly winged, emarginate 

 at each end. Rocky banks on the mountains of Carolina, and northward. 

 A small or middle-sized tree. Cones ' long. 



7. TAXUS, Tourn. YEW. 



Flowers dioecious, axillary; the sterile ones in globular few-flowered aments. 

 Anther-cells 3-8, inserted under the peltate scale. Fertile flowers solitary, 

 scaly-bracted, consisting of a single ovule on a cup-shaped disk, which becomes 

 large and berry-like in fruit, and surrounds the nut-like seed. Embryo in the 

 axis of mealy albumen. Trees or shrubs, with scattered branches, linear rigid 

 distichous leaves, and scaly buds. 



1. T. Floridana, Nutt. Leaves narrowly linear, mucronate, conspicuously 

 petioled (about 9" long), the outer margin revolute; fruit abundant; the fleshy 

 disk of the seed bright red. Banks of the Apalachicola River, Middle Florida. 

 A small tree, 10 -20 high. 



8. TORRE YA, Arnott. 



Flowers dioecious, axillary; the sterile ones in globose or oblong aments. 

 Anther-cells 4, inserted under the peltate scale. Fertile flowers solitary, con- 

 sisting of a solitary ovule surrounded with imbricated persistent scales. Disk 

 none. Seed large, ovoid, naked. Embryo at the apex of hard ruminated albu- 

 men. Cotyledons 2, linear. Trees, with whorled branches. Leaves distichous, 

 rigid, persistent. Buds scaly. 



I. T. taxifolia, Am. Branchlets opposite, 2-ranked ; leaves linear, spiny- 

 pointed, nearly sessile, light green ; sterile aments yellow, crowded ; seed ovoid, 

 drupe-like. Rich soil, along the east bank of the Apalachicola River, Middle 

 Florida. March. A middle sized tree, with durable strong-scented wood, and 

 horizontal branches. Leaves very rigid, and pungent, 1' long. Seed smooth 

 and glaucous, similar in shape and size to a nutmeg. 



