calyx absent on staminate flowers; corolla rotate, 6-8 mm. wide, the lobes tri- 

 angular-ovate and glandular; fruit obovoid, rostrate, to 35 mm. long, less than 

 15 mm. in diameter, opening by apical pores, spiny with the prickles to 15 mm. 

 long and hirsute, 3-celled. Echinocystis Wrightii (Gray) Cogn. 



Climbing on shrubs along streams and in thickets in extreme w. Trans-Pecos 

 Tex., N.M. (Grant Co.) and Ariz. (Santa Cruz and Pima cos.), June-Oct.; from 

 w. Tex., s. N.M., Ariz, and n. Mex. 



5. Echinocystis T. & G. Wild Mock-cucumber 

 A monotypic genus in North America, as interpreted here. 



1. Echinocystis lobata (Michx.) T. & G. 



High-climbing annual, essentially glabrous throughout; tendrils forked; leaves 

 suborbicular-ovate in outline, to 12 cm. long and wide, usually with 5 sharply 

 triangular serrulate cuspidate lobes; flowers 5- or 6-merous, greenish or white, 

 the staminate flowers in long racemes or panicles, the short-peduncled pistillate 

 flowers solitary or in small clusters and from the same axils as the staminate 

 flowers; corolla rotate, about 1 cm. wide, the lobes narrowly lanceolate and 

 acuminate; stamens 3, united by their filaments into a column, the nearly straight 

 anthers connivent; ovary 2-celled, with 2 erect ovules in each cell; style with a 

 broad-lobed stigma; fruit ovoid, 3-5 cm. long, to 25 mm. in diameter, bladdery- 

 inflated, somewhat beaked at summit and with weak glabrous prickles to about 

 6 mm. long, bursting somewhat irregularly at the summit; seeds flat, dark. 



In moist or wet alluvial soils in thickets of the Tex. Trans-Pecos, n. Okla. 

 and Cimarron Co. (Waterfall) and Ariz. (Coconino Co.), Aug.-Sept.; N.B. 

 to Sask., s. to Fla. and w. to Tex. and Ariz.; escaped from cult, and sporadic in 

 w. U.S. 



6. Sicyos L. One-seeded Bur-cucumber 



About 15 species in the American and Australasian tropics and temperate 

 regions. 



1. Sicyos angulatus L. 



Plant clammy-hairy, with slender climbing stems; hairs weak and distinctly 

 articulated; leaves with petioles to 8 cm. long, suborbicular in outline, cordate 

 at base, to 2 dm. long and wide, shallowly 5-angled or -lobed with the lobes 

 pointed; calyx tube subrotate, 4-5 mm. wide; corolla lobes 3-4 mm. long; fruit 

 yellowish, ovoid, pointed, 1-1.4 cm. long, to 8 mm. thick, sparingly long-setose 

 and villous-tomentose. 



In wooded areas along streams and rivers in damp or wet soils, in e. half of 

 Tex. and e. Okla. (Waterfall), May-Sept.; from s. Me. and w. Que. to Minn., s. 

 to Fla., La., Tex. and Okla. 



Fam. 128. Campanulaceae Juss. Bluebell Family 



Perennial, biennial or annual herbs, mostly terrestrial but occasionally aquatic 

 or epiphytic; leaves exstipulate, simple or very rarely dissected, alternate and 

 usually spirally arranged; flowers usually perfect and 5-merous except the gynoe- 

 cium that consists of 2 to 5 united carpels possessing a common style with 

 usually distinct stigmatic tips; ovary inferior, 2- to 5-celled or rarely unicellular; 

 placentation axile or parietal in species with unicellular ovaries; calyx usually 

 5-parted to the summit of the ovary or its tubular portion forming a rim above 

 the ovary, the lobes alternate with the corolla lobes and opposite the stamens; 

 corolla gamopetalous at least at base, usually 5-parted or -lobed, only exception- 



1571 



