ACAKTHACE.E. (ACANTHUS FAMILY.) 399 



3* CAT ALP A, Scop., Walt. CATALPA. INDIAN BEAN. 



Calyx deeply 2-lipped. Corolla bell-shaped, swelling ; the undulate 5-lobed 

 spreading border irregular and 2-lipped. Fertile stamens 2, or sometimes 4 ; 

 the 1 or 3 others sterile and rudimentary. Capsule very long and slender, 

 nearly cylindrical, 2-celled, the partition at right angles to the valves. Seeds 

 winged on each side, the wings cut into a fringe. Trees, with ovate or cor- 

 date and mainly opposite leaves. (The aboriginal name.) 



1. C. speci6sa, Warder. A large and tall tree, with thick bark; leaves 

 ample, heart-shaped, long-acuminate; corolla 2' long, nearly white, incon- 

 spicuously spotted, with obconical tube and slightly oblique limb, the lower 

 lobe emarginate ; capsule thick. Low rich woodlands, S. Ind. to Tenn., Mo., 

 and Ark. May. 



C. BiGNONioinES, Walt., of Ga, Ala. and Miss., very widely cultivated, 

 and formerly including the above species, is a low much branched tree, with 

 thin bark, smaller (if long) thickly spotted corolla (with oblique limb and 

 lower lobe entire), and a much thinner capsule. 



ORDER 79. PEDAL.IACEJE. 



Herbs, with chiefly opposite simple leaves, and flowers as of the preced- 

 ing Order, except in structure of ovary and fruit, the former being 1-celled, 

 the latter fleshy-drupaceous, with wingless seeds and thick entire cotyledons. 

 Ovary (in ours) 1 -celled, with 2 parietal intruded placenta expanded 

 into 2 broad lamellae or united into a central columella. 



1, MABTYWIA, L. UNICORN-PLANT. 



Calyx 5-cleft, mostly unequal. Corolla gibbous, bell-shaped, 5-lobed and 

 somewhat 2-lipped. Fertile stamens 4, or only 2. Fruit fleshy, the flesh at 

 length falling away in 2 valves ; the inner part woody, terminated by a beak, 

 which at length splits into 2 hooked horns, and opens at the apex between the 

 horns, imperfectly 5-celled, owing to the divergence of the two plates of each 

 placenta, leaving a space in the centre, while by reaching and cohering with 

 the walls of the fruit they form 4 other cells. Seedfi several, wingless, with a 

 thick roughened coat. Low branching annuals, clammy-pubescent, exhaling 

 a heavy odor ; stems thickish ; leaves simple, rounded ; flowers racemed, large. 

 (Dedicated to Prof. John Martyn, of Cambridge, England.) 



1. M. proboscidea, Glox. Leaves heart-shaped, oblique, entire or un- 

 dulate, the upper alternate ; corolla dull white or purplish, or spotted with yel- 

 low and purple ; endocarp of the fruit crested on one side, long-beaked. 

 Banks of the Mississippi and its lower tributaries, from S. Ind., 111., and Iowa, 

 to northern Mexico. Also cultivated and naturalized farther north. 



ORDER 80. ACANTHACE^E. (ACANTHUS FAMILY.) 



Chiefly herbs, with opposite simple leaves, didynamous or diandrous sta~ 

 mens, inserted on the tube of the more or less 2-lipped corolla, the lobes of 

 which are convolute or imbricated in the bud ; fruit a 2-celled and few- (4- 

 12-} seeded capsule : seeds anatropous, without albumen, usually flat and 



