32 DICOTYLEDONOUS. 



said to reside by the Rev. M. A. Curtis, " in only three or foui- hair-like processes of 

 its upper surface, so placed that an insect can hardly traverse it without interfering 

 with one of them, when the two sides suddenly colapse and enclose the prey, the 

 fringe or hairs of the opposite sides of the leaf interlacing like the fingers of two hands 

 clasped together." The circumscribed geographical section in which the plant has 

 been found is remarkable. This plant is lound only in the section above indicated, 

 nor has this or any other species of the genus been found in any other quarter of the 

 globe. 



Genus III. PARNASSIA. 



Sepals 5, more or less united, aestivation imbricate, united 

 to the ovary at tiie base. Petals 5, nearly perigynous, per- 

 sistent. Stamens 5, perigynous, alternate with the petals, 

 with an indefinite number of ovate sterile stamens united into 

 5 phalanges opposite the petals ; these probably consist of two 

 series accounting for their being opposite the petals. Per- 

 renial herbs, growing in wet places. 



1. P. Caroliniana. Leaves orbicular-ovate, or broad cordate, entire, gla- 

 brous, 5-7-nerved on long petioles, 2-8-inches rather coriaceous. CauTine 

 leaves low down, clasping. Stem, 1-flowered. Sepals small 5-united at the 

 base, oval, 3-ribbed, with a membranaceous margin. Petals oval or ovate, 

 with 5-7 green nerves- Sterile filaments in 5 bunches, each composed of 

 3 filaments, distinct nearly to the base about the length of the stamens, ter- 

 minated by an awn. Anthers sagittate. Styles 4, short. 



White. %. July— Aug. Near Columbia S. C. 10-20 inches. 



2. P. AsARiFOLiA. Leaves reniform, the cauline one, nearly orbicular,, 

 slightly cordate, sessile. Petals ovate, broad, obtuse, unguiculate ; sterile 

 filaments separate nearly to the base, united by threes. Leaves and flowers 

 larger than in the preceeding species. 



White. "21-. July— August. Mountains. 1-2 feet. 



Order XVIII. CISTACE^. 



Sepals 5, persistent, unequal, the ovate smallest or wanting, 

 the 3-inner with an imbricate and sometimes twisted aestiva- 

 tion. Petals 5, hypogynous, fugitive, twisted in an opposite 

 direction from the sepals. Stamens indefinite, hypogynous, 

 distinct. Anthers short, innate. Ovary a 3-5-valved, 1- 

 celled capsule, with a loculicidal dehiscence, or with the mem- 

 branes bearing the placentae extending nearly to the center 

 making it imperfectly ^-celled, and in the Lechea called 3- 

 celled. Seeds 3 to many, orthotropous. Perennial herbaceous 

 plants. Flowers of the whole order yellow. 



Genus I. HELIANTHEMUM. 



Sepals 5, unequal, the two exterior small, bract-like, and 

 sometimes wanting. Petals 5, fugitive or occasionally wan- 

 ting. Stigmas 3, large, more or less united into one. Cap- 

 sule 3-valved, few or many seeded, triangular. Sun rose\. 



1. H. Canadensis. Stem erect, at first simple, afterwards branched, bran- 



