OROBANCHACEJE. (BROOM-RAPE FAMILY.) 279 



3. C A T A L< P 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. Pod very long and slender, nearly 

 cylindrical, 2-celled ; the partition contrary to the valves. Seeds broadly winged 

 on each side, the wings cut into a fringe. (The aboriginal name.) 



1. C. BiGNONiolDES, Walt. Leaves heart-shaped, pointed, downy beneath ; 

 flowers in open compound panicles. Cultivated in the Northern States : a well- 

 known ornamental tree, with large leaves, and showy flowers, which arc white, 

 slightly tinged with violet, and dotted with purple and yellow in the throat, 

 opening in July. Pods hanging till the next spring, often 1 long. (Adv 

 froaiS. W. States?) 



4. MARTYNIA, L. UNICORN-PLANT. 



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

 Bomewhat 2-lipped. Fertile stamens 4, or only 2. Pod fleshy, and with the 

 inner part soon woody, terminated by a long beak, which at length splits into 

 2 hooked horns, and opens at the apex between the beaks, imperfectly 5-celled, 

 owing to the divergence of the two plates of each of the two partitions or pla- 

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

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

 thick and roughened coat. Low branching annuals, clammy-pubescent, exhal- 

 ing a heavy odor : stems thickish : leaves simple, rounded. Flowers racemed, 

 large. (Dedicated to Prof. Martyn, of Cambridge, a well-known botanist of 

 the last century.) 



1. HI, PKOBOScfDEA, Glox. Leaves heart-shaped, oblique, entire, or undu- 

 late, the upper alternate ; the woody endocarp crested on one side, long-horned. 

 Escaped from gardens in some places. Corolla dull white, tinged or spotted 

 with yellow and purplish. (Adv. from S. W. States.) 



ORDER 73. OROBANCHACE^E. (BROOM-RAPE FAMILY.) 



Herbs destitute of green foliage (root-parasites), monopetalous, didyna- 

 mous, the ovary one-celled with 2 or 4 parietal placentae ; pod very many- 

 seeded: seeds minute, with albumen, and a very minute embryo. Calyx per- 

 sistent, 4 - 5-toothed or parted. Corolla tubular, more or less 2-lipped, 

 ringent, persistent and withering ; the upper lip entire or 2-lobed, the low- 

 er 3"-lobed. Stamens 4, didynamous, inserted on the tube of the corolla : 

 anthers 2-celled, persistent. Ovary free, ovoid, pointed with a long style 

 which is curved at the apex : stigma large. Pod 1-colled, 2-valved ; the 

 valves each bearing on their face one placenta or a pair. Seeds very nu- 

 merous, minute, anatropous, with a minute embryo at the base of transpar- 

 ent albumen. Low, thick or fleshy herbs, bearing scales in place of lea\es, 

 lurid yellowish, or brownish throughout. Flowers solitary or spiked. 



