252 SAPINDACEAE. 



2. CARDIO3PERMTJM L. Sp. PI. 366. 1753. 



Vines, with alternate bipinnate or decompound leaves, and small axillary 

 tendril-bearing corymbs of slightly irregular polygamo-dioecious flowers. Ten- 

 drils 2 to each corymb, opposite. Pedicels jointed. Sepals 4, the 2 exterior 

 smaller. Petals 4, appendaged at the base, 2 larger and 2 smaller. Disk 1-sided, 

 undulate. Stamens 8; filaments unequal. Ovary 3-celled; style short, 3-cleft; 

 ovules 1 in each cavity. Capsule inflated, 3-lobed or 3-angled. Seeds globose 

 with a large hilum; cotyledons eonduplicate. [Greek^ heart-seed.] About 15 

 species, of warm and temperate regions. Type species: Cardiospermum Hali- 

 cacabum L. 



Capsules longer than broad. 3-3.5 cm. long. 1. C. Halicacabum. 



Capsules broader than long, about 1 cm. broad. 2. C. microcarpum. 



1. Cardiospermum Halicacabum L. Sp. PI. 366. 1753. 



Annual or biennial, slender, glabrous or slightly pubescent, 0.6-5 m. long. 

 Leaves petioled, 5-10 cm. long ; segments stalked, ovate or oblong, acute or 

 acuminate, sharply serrate; peduncles commonly longer than the leaves; flowers 

 white, 6-8 mm. broad ; petals obovate ; filaments pubescent ; capsule about 3 cm. 

 long, globose-pyriform, pubescent, seeds globose, nearly black, about 5 mm. 

 thick, the large white hilum cordate. 



Scrub-lands and cultivated grounds, New Providence and Eleuthera : New 

 Jersey to Missouri, Florida, and Texas ; West Indies ; Mexico to tropical South 

 America. BALLOON-VINE. 



2. Cardiospermum microcarpum H.B.K. Nov. Gen. 5: 104. 1S21. 



Climbing to a length of 1.5-3 m., branched, finely pubescent, slender, the 

 stem grooved. Leaves thin, biternately compound, slender-petioled, 7-15 cm. 

 long and about as broad as long, the ultimate segments ovate to lanceolate in 

 outline, coarsely lobed, cleft or incised ; peduncles slender, about as long as 

 the leaves; corymbs several-flowered; flowers white, about 4 mm. broad, the 

 upper petals 3 times as long as the sepals; capsule subglobose, 3-lobed, pubes- 

 cent, veiny, depressed at the top, about 1 em. thick; seeds similar to those of 

 the preceding species but smaller. 



Waste-lands, Abaco and New Providence : Bermuda ; Florida ; West Indies ; 

 continental tropical America. SMALL BALLOON-VINE. 



3. THYANA Hamilt. Prodr. 36. 1825. 



[THOUINIA Poit. Ann. Mus. Paris 3: 70. 1804. Not L. f. 1781.] 

 Shrubs or trees, with alternate 3-foliolate or 1-foliolate leaves and small, 

 mostly white, regular clustered polygamous or dioecious flowers. Calyx 4-5- 

 parted. Petals 4 or 5 or wanting. Disc annular, lobed. Stamens 8-10, dis- 

 tinct, the filaments pilose. Ovary 3-lobed, 3-celled; ovules 1 in each cavity; 

 style slender, 3-cleft or entire. Fruit samaroid, the samaras usually 3, coria- 

 ceous, at length separating from the axis. Seeds exarillate. [From the Greek 

 name of an odoriferous tree.] About 15 species, natives of tropical America. 

 Type species: Tliyana simplicifolia (Poit.) Hamilt. 



1. Tliyana discolor (Griseb.) Hitchc. Eep. Mo. Bot. Gard. 4: 72. 1893. 

 Thouinia discolor Griseb. Fl. Br. W. I. 127. 1859. 



A shrub, up to 2.5 m. high, or a small tree, sometimes 5 m. high, the rather 

 slender twigs and the inflorescence whitish-tomentose. Petioles 2.5 cm. long or 



