332 JUGLANDACEAE 



1. Saururus cfemuus L. Stems 3-12 dm. tall: leaf -blades ovate to ovate- 

 lanceolate, 8-15 cm. long, acuminate, petioled: racemes 1-2 dm. long: filaments 

 clavate, about 4 mm. long: fruit depressed, the carpels about 2 mm. high. 



In marshes and along streams, Ontario to Minnesota, Connecticut, Florida and Texas. 

 Summer. 



Family 2. PIPERACEAE H.B.K. Pepper Familt. 



Herbs, shrubs or trees. Leaf-blades mostly fleshy or leathery. Spikes, or 

 rarely racemes, simple or compound, the bractlets cup-like or peltate. Androe- 

 cium of 2-6 or rarely 8-10 stamens. Gynoecium of 3 or rarely more united 

 * carpels, the ovary 1-celled. Fruit drupaceous. 



1. PEPEROMIA K. & P. 



Herbs, commonly epiphytic. Leaf-blades fleshy. Spikes stiff, the bractlets 

 peltate. Stamens 2. Pistil solitary. Stigma tufted. Drupe with a thin pericarp. 



Leaf-blades thin, 3-nerved, 1-4 cm. long: spikes loosely flowered. 1. P. leptoalachya. 



Leaf-blades leathery, 5-9 nerved, 6-12 cm. long: spikes densely flowered. 2. P. obtusifolia. 



1. Peperomia leptostdchya (Nutt.) Chapm. Plant pubescent: stem erect, 

 1-4 dm. tall, slender: leaf -blades 1-4 cm. long, cuneate on the lower part of the 

 stem, obovate to ovate above: spikes less than 3 mm. thick. 



In hammocks, peninsular and eastern Florida. 



2. Peperomia obtusifolia (L.) A. Dietr. Plant glabrous: stem creeping, 2-8 

 dm. long: leaf-blades 6-12 cm. long, oval varying to ovate or obovate: spikes over 3 

 mm. thick. [P. magnoliae folia (L.) C. DC] 



In hammocks, peninsular Florida and the Keys. Also in tropical America. 



Order 2. CASUARINALES. 



Shrubs or trees with loosely jointed branches resembling stems of Equi- 

 setum. Leaves reduced to scales whorled at the nodes and decurrent on the 

 internode. Flowers monoecious, the staminate in slender terminal spikes with 

 imbricated bracts, often with a posterior and anterior perianth member and 1 

 stamen. Pistillate flowers in dense cones or spikes, the perianth wanting : ovary 

 1-celled : style-branches slender. Fruit an aggregate of winged achenes. 



Family 1. CASUARINACEAE Lindl. Beefwood Family. 

 Characters of the order. 



1. CASUARINA Adans. 



The only genus. Beefwooi>. 



1. Casuarina equisetifolla Forst. A tree often 10 m. tall, with many slender 

 branches: leaves (scales) 1-3 mm. long, 6-S in each whorl: staminate spikes 1-4 cm. 

 long: pistillate spikes globular, becoming 1-2 cm. in diameter in fruit: seed-wing 

 nearly thrice as long as the body. 



In sand, peninsular Florida and the Keys. Naturalized from Australia. 



Order 3. JUGLANDALES. 



Aromatic trees. Leaves alternate, exstipulate: blades pinnate. Flowers 

 monoecious, the pistillate in lateral aments on the tvngs of the preceding year, 

 with a 2-6-lobed calyx bearing several rows of stamens, or the calyx obsolete. 

 Pistillate flowers terminal, consisting of an involucrate incompletely 2-4-eelled 



