262 CONTRIBUTIONS FEOM THE NATIONAL HERBAKIUM. 



2. Valerianella woodsiana (Torr. & Gray) Walp. 



Moist alluvial bottom lands; rare; known only from High Island to Chain Bridge. 

 May. Eastern U. S. 



3. Valerianella clienopodifolia (Pursh) DC. 



Moist alluvial soil; rare; reported only from Sandy Landing and the region from 

 High Island to Chain Bridge. May. Eastern U. S. (Fedia fagopy rum Torr. & Gray. 



4. Valerianella radlata (L.) Dufr. 



Meadows and low alluvial situations; several scattered localities near the Potomac, 

 but apparently rare. May. Eastern U. S. 



147. DIPSACACEAE. Teasel Family. 



1. BIPSACUS L. 

 1. Dipsacus sylvestris Huds. Teasel. 



Waste places; known only from Great Falls and from the Potomac flats between 



Outlet Lock and High Island. July. Naturalized from Em*, in the northeastern U. S- 



148. CUCURBITACEAE. Gourd Family. 



Leaves deeply 3-7-lobed, the lobes triangular-lanceolate; staminate flowers in narrow 

 branched racemes; pistillate flowers solitary; fruit large, 5 cm. long, armed with 

 short bristle-like spines, dehiscent at the apex 1. MICE.AMPELIS. 



Leaves 5-angled or 5-lobed, with shallow lobes; staminate flowers in loose corymbs or 

 racemes; pistillate flowers clustered in a head at the end of a peduncle; fruits 

 small, burlike, sessile, 3-10 in a cluster, indehiscent 2. SICYOS. 



1. MICRAMPELIS Raf. 



1. Micrampelis lobata (Michx.) Greene. Wild cucumber. 



Damp soil along streams, especially along the Potomac. July-Sept. Eastern N. 

 Amer. (Echinocystis lobata Torr. & Gray.) 



2. SICYOS L. 

 1. Sicyos angulatus L. Star cucumber. 



Alluvial thickets along the Potomac and its tributaries. Aug.-Oct. Eastern N. 

 Amer. 



The root and seeds are bitter and have diuretic properties. 



149. CAMPANULACEAE. Bellflower Family. 



Leaves cordate-clasping; corolla saucer-shaped 1. SPECULAS.IA. 



Leaves sessile or stalked; corolla bell-shaped or saucer-shaped 2. CAMPANULA, 



1. SPECULARIA Heist. 



1. Specularia perfoliata (L.) A. DC. Venus's looking-glass. 



Sandy fields, dryish slopes, and thickets; common. June. Eastern N. Amer. 

 {Legouzia perfoliata Britton.) 



2. CAMPANITLA L. Bellflower. 



Stems very slender, weak, usually reclining, downwardly roughened on the angles; 

 leaves linear-lanceolate, less than 1 cm. wide; flowers less than 1 cm. long, 



whitish I.e. aparinoides. 



Stems stout, erect, not roughened; leaves heart-shaped to oblong or lanceolate, large; 

 flowers very much larger, blue. 

 Corolla bell-shaped; flowers borne in a long bracted l-sided raceme; capsule globose, 



opening by pores at the base 2. C. rapunculoides. 



Corolla saucer-shaped; flowers borne in a long leafy spike; capsule top-shaped, 

 opening by pores at the summit 3. C. americana. 



