262 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



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



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

 May. Eastern U. S. b 



3. Valerianella chenopodifolia (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 fagopyrum Torr. & Gray. 



4. Valerianella radiata (L.) Dufr. 



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

 but apparently rare. May. Eastern U. S. 



147. DIPSACACEAE. Teasel Family. 



, w 1. DIPSACUS L. 



1. Dipsacus sylvestris ITuds. Tease 



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

 Outlet Lock and High Island . July. Naturalized from Eur. in the northeastern U. S • 



148. CUCUEBITACEAE. Gourd Family. 



Leaves deeply 3-7-Iobed, 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 l MICRAMPELIS 



Leaves 5-angled or 5-Iobed, with shallow lobes; staminate flowers in loose corvmbe or 

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

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



1. MICRAMPELIS Raf. 

 1. Micrampelis lobata (Michx.) Greene. WlLD 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. Qm . 



All ■ i iZ- 1 feTAR 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. SPECTJLARIA 



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



1. SPECULARIA Heist. 

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



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

 (Legouzia perfoliata Britton.) 



2. CAMPANULA 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 lone' 



whitish . „ , ' iJ 



o. . 1- C. apannoides. 



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

 flowers very much larger, bine. ' ' 



Corolla bell-shaped; flowers borne in a long bracted 1-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' 



