JUGLANDACEAE. 9 



Order CASUARINALES. 



Shrubs or trees, Avitli loosely jointed branches resembling stems of 

 Equisetum. Leaves scale-like, whorled at the nodes and decurrent on the 

 internodes. Flowers monoecious, the staminate in slender terminal spikes 

 with imbricate bracts, often with a posterior and anterior perianth-member, 

 and 1 stamen. Pistillate flowers in dense cones or spikes, the perianth 

 wanting. Ovary 1-eelled. Style-branches slender. Fruit an aggregate of 

 winged achenes. 



Family 1. CASUARINACEAE. Beefwood Family. 



Stems with more or less whorled branches. Staminate spikes long- 

 stalked. Pistillate spikes short-stalked. Gynoecium 2-carpellary. 



1. CASUAEINA Adans. Stem clothed with a smooth or smoothish bark, 

 except when very old. Stamens with long filaments and short anthers. 

 Stigmas elongate. Fruiting spike compact. 



1. C. equisetifolia Forst. Tree often 10 m. tall, with many slender branches: 

 leaves (scales) 1-3 mm. long, 6-8 in each whorl: staminate spikes 1-4 em. 

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

 wing nearly thrice as long as the body. — Spr. & sum. 



The Beefwood grows on sandy shores in southern Florida, particularly on the 

 Keys. It is native of Oceanica, and was introduced into Florida as a shade tree. 

 The heart-wood is pink, turning dark, close-grained, heavy, hard, and strong. Also 

 known as Australian-pine. (ir. /. ) 



Order JUGLANDALES. 



Trees. Leaves alternate : blades pinnate. Flowers monoecious, the 

 staminate in lateral aments on the twigs 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 2-4-carpellary 

 gynoecium: calyx partially adnate to the gynoecium. Fruit drupe-like, 

 the nut enclosed in an indehiscent or a dehiscent involucre. Seed oily. 



Family 1. JUGrLANDACEAE. Walnut Family. 



Aromatic trees, with hard wood. Leaves with unequally pinnate 

 blades. Staminate aments solitary or clustered. Involucre of the fruits 

 dry or juicy. 



staminate aments stout, simple, sessile or short-stalked : husk indehiscent ; nut 

 sculptured. 1. Juglans. 



Staminate aments slender, branched, long-stalked : husk dehiscent : 



nut not sculptured. 2. Hicoria. 



1. JUGLANS L. Bark furrowed. Pith in plates. Leaflets condupli- 

 cate in vernation. Staminate aments simple. Anther-connective conspicuous. 

 — Walnut. 



1. J. nigra L. Tree becoming .50 m. tall, the bark dark-brown in broad 

 ridges: leaflets 15-23; blades 8-10 cm. long, rounded or subcordate at the 



