20 AETOCAEPACEAE. 



23. Q. Catesbaei Michx. Tree becoming 20 m. tall: leaf-blades oblong to 

 ovate in outline, 9-20 cm. long, glabrous, except the tufted vein-axils beneath, 

 deeply pinnate-lobed, the lobes oblong, ovate or usually lanceolate, often 

 curved: acorn short-stalked; cup broadly turbinate, sometimes rather flat, 

 25-30 mm. wide; nut ovoid, 20-25 mm. long. 



The Turkey-oak grows on sand-ridges and in pinelands in northern Florida and 

 the northern portion of the peninsula. The brown heart-wood is close-grained, 

 heavy, hard, and strong. iCont.) 



Order URTICALES. 



Shrubs or trees, or herbs. Leaves alternate, or in the case of herbs 

 often opposite: blades simple, entire, toothed, or divided. Flowers vari- 

 ous, not in aments. Calyx present. Corolla wanting. Androecium often 

 of as many stamens as there are sepals. Gynoeeium of a single carpel or 

 of 2 united carpels. Fruit an achene, a samara, a drupe, a syncarp. or a 

 syconium. 



Fruit an achene, the achenes in the fleshy calyxes, on the outside or inside of a 

 receptacle : anthers inflexed. Fam. 1. Artocaepaceae. 



Fruit a samara or a drupe, or nut-like : anthers erect. Fam. 2. Ulmaceae. 



Family 1. ARTOCARPACEAE. Mulberry Family. 



Shrubs or trees, the sap milky. Leaves mostly alternate : blades equi- 

 lateral, entire, toothed, or lobed. Flowers monoecious or dioecious, in 

 ament-like spikes or enclosed in a receptacle, the stamiuate with 3 or 4 

 stamens, the pistillate with a calyx of 3-5 sepals which greatly enlarge and 

 subtend or envelop the achene: gynoeeium of 1 or 2 united carpels; 

 styles or stigmas 1 or 2. Fruit a syncarp or syconium. 



Staminate and pistillate flowers on the outside of the receptacle. 



Staminate and pistillate flowers in ament-like spikes. 1. MORUS. 



Staminate flowers in ament-like racemes ; pistillate flowers in heads. 2. Papyrids. 



Staminate and pistillate flowers on the inside of a closed receptacle. 3. Ficcs. 



1. MORUS [Tourn.] L. Shrubs or trees, with scaly bark. Leaves decid- 

 uous: blades commonly serrate, sometimes lobed. Staminate flowers in cylin- 

 drie spikes, with 4 sepals and 4 stamens. Pistillate spikes cylindric: sepals 4, 

 the lateral ones larger than the others: stigmas 2, short. Fruit cylindric, the 

 achenes included in the calyx. — Spr. — Mulberry. 



Leaf-blades glabrous beneath or sparingly pubescent on the nerves. 



Syncarp white or pinkish. 1- -1^- <'"'"• 



Syncarp black at maturity. -■ J^- »iijn'. 



Leaf-blades softly pubescent beneath. 3. M. rubra. 



1. M. alba L. Tree 5-12 m. tall, with sparingly pubescent twigs: leaf-blades 

 ovate to oval-ovate, 6-15 cm. long, generally pubescent about the veins 

 beneath: staminate spikes 1-2 cm. long: fruits subglobose to oval-oblong, 1-2 

 cm. long, white or pinkish. 



The White-mulberry grows in woods and on roadsides in northern Florida 

 and the northern portion of the peninsula. Nat. from Europe. The yellowish- 

 brown heart-wood is close-grained, rather light but hard. (Cont.) 



2. M. nigra L. Tree sometimes becoming 8 m. tall, or shrub, with pubescent 

 twigs: leaf-blades ovate, 4-15 cm. long, abruptly short-pointed, becoming 

 glabrous, but usually rough above: staminate spikes 1-2 cm. long: fruits oval- 

 oblong, 1-2 cm. long, black. 



The Black-mulberry grows in fields and on roadsides in peninsular Florida. 

 Nat. from Europe. The yellowish-brown heart-wood is close-grained, rather light. 

 and hard. {Cont.) 



