ACANTHACE^. (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 otliers 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. speciosa, Warder. A large and tall tree, with tliick 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. BiGxoNioiDES, AValt., of Ga , Ala. and Miss., very widely cultivated, 

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

 thin bark, smaller (1^'loug) thickly spotted corolla (with oblique limb and 

 lower lobe entire), and a much thinner capsule. 



Order 79. PEDALIACE^. 



Herbs, ic'itli chiejly 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 placentas expanded 

 into 2 broad lamellae or united into a central columella. 



1. MARTYNIA, 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 eacl 

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

 the walls of the fruit they form 4 other cells. Seeds 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.^. (Acanthus Family.) 



Chiefly herbs, ivith 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 - 

 120 seeded capsule : seeds anatropous, ivithout albumen, usually flat ajid 



