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 %' -V in diameter. Attached to the roots are hollow conical knobs 

 called Cypress-Knees. , 



6. THUJA, Tomn. Arbor-Vit^. 



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. oeeidentalis, L. (Arbor- Vit^.) 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. 



I. 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 i-cd. —Banks of the Apalachicola Eiver, Middle Florida. 

 — A small tree, 10° - 20° high. 



8. TORRE YA, Amott. 



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. 



1. 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. 



