CUCURBITACEAE 181 



Family 120. VALERIANACEAE Batsch. 

 Herbs with opposite leaves, no stipules and pauicled or cymose flowers. 

 Calyx superior. Corolla tubular or funnel-form, its limb 5-lobed. Sta- 

 mens 1-4, inserted in the tube of the corolla. Ovary inferior, 1-3-celled, 

 one of the cells containing one ovule, the other empty. 



1. VALERIANELLA Poll. Corn Salad. 

 Annual branching herbs with cymose clustered white (in ours) flowers. 

 Calyx minutely 4-5-toothed. Stamens three. 



Fruit V^ long. 1. V. radiata. 



Fruit Y'-i'^ long- 2. V . sienocarpa. 



1. V. radiata (L. ) Dufr. 6^-12^ high: leaves oblong-lanceolate, den- 

 tate : fruit ovate-tetragonal, the empty cavities as thick as the fertile one 

 and separated by a broad, shallow groove. — Along gravelly streams near 

 Adams and west of Lee's Summit. May-June. 



2. V. stenocarpa (Engelm.) Krok. Like the last but smaller : fruit 

 oblong-tetragonal, the empty cavities narrower than the fertile one, and 

 separated by a narrow groove. — Occurs locally in barrens throughout the 

 southwestern part, especially west of Lee's Summit. May-June. 



Family 121. CUCURBITACEAE B. Juss. 

 Climbing tendril-bearing herbs with alternate petioled leaves and mon- 

 oecious or dioecious flowers. Calyx 5-lobed. Petals usually five, sepa- 

 rate or united, inserted on the tube of the calyx. Stamens three, two 

 with 2-celled anthers, the other with a 1-celled anther, the anthers usu- 

 ally more or less united. Ovary inferior, 1-3-celled. Fruit a pepo. 



Flowers large, yellow. 1. CucuRBiTA. 

 Flowers small, whitish. 



Ovary 1-celled, 1-ovuled. 2. SiCYOs. 



Ovary 2-celled, 4-ovuled. 3. Micrampelis. 



1. CUCURBITA L. 



Flowers axillary, solitary. Calyx and corolla 5-lobed. Ovary oblong 

 with 3-5 parietal, many-ovuled placentae. 



1. C. foetidisaima H.B.K. Wild Pumpkin. 3°-15° long, scabrous- 

 hirsute : leaves triangular-cordate, serrulate : flowers 2'-4^ long. — Spar- 

 ingly adventized at Sheffield, near Waldo Park, and at Little Blue Tank. 

 June-July. 



2. SICYOS L. 



Staminate flowers corymbose, the fertile in capitate clusters. Calyx 

 5-toothed. Corolla rotate, deeply 5-parted. Fruit indehiscent, prickly. 



1. S. angidatus L. Onk-seeded Bur Cucumber. High climbing, 

 pubescent : leaves orbicular, 5-lobed or 5-angled, denticulate : fruit cov- 

 ered with stinging spines. Often common in low woods. August- 

 October. 



