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dium tripartium Naudin.)—Found at Uvalde and Laredo. Var. TENUISECTA Watson 
has leaves 5-parted, the segments laciniately lobed with linear or even filiform lobes. 
(Sicydium Lindheimeri, var. tenuisectum Gray.)—Chiefly from the Leona River and 
Eagle Pass to the Pecos and westward. 
8. ECHINOCYSTIS Torr. & Gray. (WILD BALSAM-APPLE.) 
Tall climbing annual, with 3-forked tendrils, small greenish-white 
moncecious flowers (sterile in racemes, fertile in small clusters or soli- 
tary), lanceolate or oval petals, 3 more or less united anthers, and a 
fleshy at length dry and prickly (not gibbous) fruit bursting at the 
summit and containing few large erect or ascending seeds. 
1. E. Wrightii Cogn. Stems pubescent: leaves reniform-cordate, subangulate, 
triangular-acuminate at apex, puberulent, scarcely denticulate: fruit oblong, 2.5 to 
3.5em. long, apiculate-beaked and armed with long soft-hirsute prickles 12 mm. long. 
(Elaterium? Wrightiti Gray.)—Mountains near El Paso. 
9. CYCLANTHBERA Schrad. 
Slender glabrous climbers, with very small racemose or panicled 
white sterile flowers and a solitary fertile one in the same axil, rotate 
deeply 5-parted corolla, stamens united into a central column and with 
solitary annular anthers, 1 to 3 (usually 2)-celled ovary with few erect 
or ascending ovules, and a spiny obliquely ovoid and gibbous beaked 
fruit bursting irregularly. 
1. C. dissecta Arn. Leaves digitately 3 to 7-foliolate, the oblong divisions some- 
what lobed or toothed : tendrils simple or bifid : fruit 2.5 em. long, on a short pedun- 
cle.—Throughout Texas. 
10. SICYOS L. (ONE-SEEDED BUR-CUCUMBER.) 
Climbing annuals, with 3-forked tendrils, small whitish monecious 
flowers, sterile and fertile mostly from the same axils (the former 
corymbed, the latter in a capitate cluster, long-peduncled), 5 petals 
united below into a bell-shaped or flattish corolla, anthers cohering in 
@ mass, slender style with 3 stigmas, 1-celled ovary with a single sus- 
pended seed, and a dry and indehiscent ovate fruit filled by the single 
seed and covered with barbed prickly bristles. 
1. S. angulatus L. Leaves roundish heart-shaped, 5-angled or lobed, the lobes 
pointed: plant clammy-hairy.—River-banks, throughout eastern and southern 
Texas. 
CACTACEA. (Cactus FAmMILy.) 
Green fleshy and thickened persistent mostly leafless plants of pecul- 
iar aspect, globular or columnar, tuberculated or ribbed, or jointed and 
often flattened, usually armed with bundles of spines from the areole 
which constitute the axils of the (mostly absent) leaves: with flowers 
having numerous sepals, petals, and stamens, usually in many series, 
the cohering bases of all of which coat the inferior 1-celled many-ovuled 
