322 FLORA. 



Pistillate flowers subtended by 3 or 4 bractlets (perianth?). Ovary 

 i-celled; style slender, stigmatic above ; ovule laterally affixed, amphit- 

 ropous. Endosperm thin. Only one family. 



Family 1. LEITNERlACEAE Drude. 

 Cork-wood Family. 

 Aments expanding before the leaves. Staminate flowers with 3-12 

 stamens inserted on the receptacle ; filaments distinct ; anthers, oblong 

 erect, 2-celled, the sacs longitudinally dehiscent. Style terminal, grooved 

 and flattened, recurved, caducous. Fruit an oblong drupe with thin 

 exocarp and hard endocarp. Testa thin. Cotyledons flat, cordate at the 

 base ; radicle short, superior. Comprising only the following genus of 

 the southern U. S. 



1. LEITNERIA Chapm. 



Characters of the family. One species, or perhaps two. [In honor of Dr. E. F. 

 Leitner, a German naturalist, killed in Florida during the Seminole war.] 



1. Leitneria Floridana Chapm. Leitneria. Cork-wood. (I. F. f. 1163.) 

 Bark gray and rather smooth ; young twigs, leaves and aments densely pubescent. 

 Leaves oblong or elliptic-lanceolate, narrowed at the base, bright green, firm, 

 0.7-1.5 dm. long, finely pubescent, at least on the veins, and rugose-reticulated 

 beneath; staminate aments ascending, 2-5 cm. long, their bracts triangular-ovate, 

 acute, tomentose; pistillate aments shorter, borne toward the ends of the twigs; 

 drupe slightly compressed, about 2 cm. long, 6-8 mm. thick, rugose-reticulated. 

 In swamps, S. Mo. to Tex., and in Fla. Wood lighter than cork and probably 

 the lightest wood known, weighing only about 12^ lbs. per cubic foot. March. 



Order 6. BALANOPSIDALES, 



includes only the family Balanopsidaceae, comprising the genus Balanops 

 of Australasia. 



Order 7. JUGLANDALES. 



Trees with alternate pinnately compound leaves, and monoecious 

 bracteolate flowers, the staminate in long drooping aments, the pistillate 

 solitary or several together. Staminate flowers consisting of 3-numerous 

 stamens with or without an irregularly lobed perianth adnate to the 

 bractlet, very rarely with a rudimentary ovary. Anthers erect, 2-celled, 

 the sacs longitudinally dehiscent ; filaments short. Pistillate flowers 

 bracted and usually 2-bracteolate, with a 3-5-lobed (normally 4-lobed) 

 calyx or with both calyx and petals, and an inferior 1 -celled or incom- 

 pletely 2-4-celled ovary. Ovule solitary, erect, orthotropous ; styles 2, 

 stigmatic on the inner surface. Fruit in our genera a drupe with inde- 

 hiscent or dehiscent, fibrous or woody exocarp (husk ; ripened calyx ; 

 also regarded as an involucre), enclosing the bony endocarp or nut which 

 is incompletely 2-4-celled. Seed large, 2-4-lobed. Endosperm none. 

 Cotyledons corrugated, very oily. Radicle minute, superior. Only one 

 family. 



Family 1. JUGLANDACEAE Lindl. 

 Walnut Family. 

 Characters of the order. Six genera and about 35 species, mostly 

 of the warmer parts of the north temperate zone. The young leaves 

 in the bud are stipulate in at least two species of Hicoria. 



Husk indehiscent; nut rugose or sculptured. I. Juglans. 



Husk at length splitting into segments; nut smooth or angled. 2. Hicoria. 



