ULMACEAE. 103 



or as long: anthers oval, sparingly pubescent. Calyx of the pistillate 

 flowers small, 4-parted, the lobes or sepals narrow, deciduous; petals none; 

 ovary sessile, 2-celled; ovules 2 in each cavity; style columnar; stigmas subu- 

 late, longer than the style. Drupe globose or oval, stalked. Seed solitary. 

 Only the following genus. 



1. PICRODENDRON Planch, in Hook. Loncl. Jour. Bot. 5: 579. 1846. 



Characters of the family. [Greek, bitter tree.] Three species, natives of 

 the Bahamas, Jamaica, Cuba and Hispaniola. Type species: Juglans baccata 

 L. (Picrodendron arboreum Macfad.). 



1. Picrodendron macrocarpum (A. Eich.) Britton, Bull. N. Y. Bot. Gard. 4: 

 139. 1906. 



ScJimidelia macrocarpa A. Kich. in Sagra, Hist. Cub. 10: 116. pi. 30. 



1845. 

 Picrodendron ba&catum bahamense Krug & Urban, Bot. Jahrb. 15: 308. 



1893. 



A tree, up to 20 m. high, or sometimes a shrub. Petioles minutely pubes- 

 cent, 2-8 cm. long; leaflets 1.5-9 cm. long, oblong, oval or obovate, usually 

 rounded or emarginate at the apex, narrowed or cuneate at the base, finely 

 pubescent, or becoming glabrate, finely reticulate-veined; calyx yellowish, the 

 narrowly linear-lanceolate lobes 2.5-3.5 mm. long; drupe oval or ovoid, 2-2.5 

 cm. long, longer than its stalk. 



Rocky coppices, Abaco, Andres, New Providence, Eleuthera. Cat Island, Great 

 Guana Cay, and Long Island: Cuba. Referred by Dolley to Picrodendron juglans 

 Griseb. Erroneously called Olive. BLACK WOOD. Catesby, 2 : pi. 32. 



Order 5. URTICALES. 



Trees, shrubs or herbs, the flowers Avith a calyx but without corolla, 

 small, not borne in aments, monoecious, dioecious or polygamous ; ovary 

 1-celled, superior. 



Fruit not an achene : trees, shrubs or herbs : ovule pendulous. 



Trees with alternate leaves, the sap not milky. Fam. 1. ULMACEAE. 



Trees with alternate leaves and milky sap. Fam. 2. MORACEAE. 



Fruit an achene ; herbs with small clustred greenish flowers ; 

 ovule erect or ascending. Fam. 3. URTICACEAE, 



Family 1. ULMACEAE Mirbel. 

 ELM FAMILY. 



Trees or shrubs, with alternate simple serrate petioled pinnately-veined 

 stipulate leaves, the stipules usually fugacious. Flowers small, monoe- 

 cious, dioecious, perfect or polygamous, clustered, or the pistillate solitary. 

 Perianth 3-9-parted or of 3-9 distinct sepals. Petals none. Stamens in 

 our species as many as the perianth-lobes or sepals and opposite them; 

 filaments straight; anthers ovate or oval, longitudinally dehiscent. Ovary 

 1-celled (rarely 2-celled), mostly superior; ovule solitary, pendulous, ana- 

 tropous or amphitropous ; styles or stigmas 2. Fruit a samara, drupe or 

 nut. Endosperm of the seed little or none. Embryo straight or curved ; 

 cotyledons mostly flat. About 13 genera and 140 species, widely dis- 

 tributed in temperate and tropical regions. 



