TREES OF FLORIDA. 



Subkingdom SPERMATOPHYTA. Seed Plants. 

 Plants producing flowers and seeds. A seed contains an embryo 

 consisting of a short stem (radicle or caiilicle), one, two or several 

 rudimentary leaves (cotyledons), and a terminal bud (plumule). 



Ovules, and seeds, borne on the face of a scale : stigma wanting. I- Gtmnospeemae. 



Ovules, and seeds, borne in a closed cavity (ovary) : stigma 



present. II. Axgiospermae. 



Class I. GYMNOSPERMAE. Cone Plants. 



Carpel, or pistil, represented by a scale upon the face of which 

 the ovules are borne and the naked seeds are matured. 



Order FINALES. 



Shrubs or trees. Leaves scale-like or narrow, or needle-like and often 

 borne in bundles. Flowers mainly monoecious, the cones of spirally imbri- 

 cate bracts, or in Taxaceae the ovulate flowers often solitary. Seeds borne 

 in cones of dry or fleshy scales, enclosed, or wholly or partially naked. 



Ovulate flowers several, with carpellary scales, these sometimes bracted : cone either 

 dry or fleshy. 

 Carpellary scales with bracts, not peltate : ovules inverted : buds scaly : wing 

 accompanying the seed a portion of the carpellary scale. 



Fam. 1. PiNACEAE. 



Carpellary scales with bracts, mostly peltate, or fleshy : 



ovules erect : buds naked : wing of the seed, when 



present, a portion of the testa. Fam. 2. Juniperaceae. 



Ovulate flowers solitary or 2, without carpellary scales : 



cone drupaceous or baccate. Fam. 3. Taxaceae. 



Family 1. PINACEAE. Pine Family. 



Mostly evergreen resin-yielding shrubs or trees, typically conic, with 

 flaky or brittle bark, the buds scaly. Leaves narrow and solitary or 

 needle-like and usually several together, each group with a sheath at the 

 base. Ovulate aments with bracted scales. Ovules inverted. Cone of dry 

 scales. Seeds usually 2 on each scale, often samara-like. 



1. PINTJS [Tourn.] L. Trees or rarely shrubs. Leaves needle-like, in 2 's 

 or 3 's and each with 2 fibro-vascular bundles. Staminate aments elongate, at 

 the ends of branches of the preceding year. Ovulate aments globular or slightly 

 elongate. Cones spreading: scales at length woody and spreading, each with 

 a dorsal usually spine-armed appendage. Seed samara-like. — Winter or spr. — 

 Pine. 



Resin-ducts of the leaf contiguous to the fibro-vascular bundle. 



Cones elongate, of a conic type and over twice as long as thick when closed, 

 slightly umbonate, the scale-appendages flat or slightly elevated, with 

 decidedly recurved or hooked spines. 



Trees of Florida 1 1 



Library 

 N. C. State College 



