12 PRIMULACEiE. Anagallis. 



& 2. Anagallide^, Endl. Capsule opening transversely. Seeds amphitropous. 



4. ANAGALLIS. Linn. ; Endl. gen. 4213. PIMPERNEL,. 



[ From the Greek, anageleo, to langli ; from its supposed exhilarating qualities.] 



Calyx 5-parted. Corolla rotate, deeply 5-parted. Stamens 5 : filaments hairy. Capsule 

 globose, opening horizontally all round. Seeds numerous. — Herbs, with squar.e mostly 

 procumbent stems and opposite entire leaves. Peduncles axillary, opposite, one-flowered, 

 without bracts. Corolla blue or red. 



1. Anagallis arvensis, Linn. Scarlet Pimpernel. Red Ckicktveed. 



Stem procumbent ; leaves ovate, sessile, dotted underneath ; segments of the corolla 

 crenate, and glandular-ciliate on the margin. — Linn. sp. 1. p. 148; Engl. lot. t. 529; Pursh, 

 jl. L p. 135 ; Ell. sk. 1. p. 235 ; Bigel. Jl. Bost. p. 74 ; Torr. fl. \. ip. 209 ; Beck, hot. 

 p. 291 ; Darlingt. fl. Cest. p. 123 ; Dtihy in DC. prodr. 8. p. 69. 



Annual. Stem 4-12 inches long, branching, smooth. Leaves about half an inch long, 

 often clasping, rather acute, with blackish dots underneath. Flowers on axillary peduncles, 

 which are longer than the leaves, and at length recurved. Calyx-segments lanceolate-subulate, 

 rough on the margin. Corolla scarlet with a purple centre, longer than the calyx. Stamens 

 scarcely half the length of the corolla : filaments purple. Capsule spherical, smooth ; the 

 upper portion separating from the lower like the lid of a box. 



Sandy fields, cultivated grounds ; rather common, particularly near New- York, and on 

 Long Island and Staten Island. Introduced from Europe. June - October. The flowers 

 open about 8 o'clock in the morning, and close about 2 o'clock in the afternoon : hence the 

 plant is often called the Poor-marCs Weatherglass. 



§ 3. HoTTONiE^, Endl. Capsule opening by valves. Seeds anatropous. 



5. HOTTONIA. Linn.; Endl. gen. 42X4. WATER-FEATHER. 



[ In honor of Pierre Hotton, a Professor of Leyden, who lived in the 17th century.] 



Calyx deeply 5-parted. Corolla salver-form, 5-lobed. Stamens 5, included, inserted on the 

 tube of the corolla. Stigma globose. Capsule globose ; the valves cohering at the base 

 and apex. Seeds numerous. — Aquatic herbs, with pectinate submerged leaves. Scapes 

 jointed. Flowers white or pale purple, verticillate. 



I. HoTTONiA INFLATA, Ell. American Water-feather. 



Internodes of the scape inflated ; whorls 3 - 5-flowered , the flowers pedicellate. — Ell. sk, 

 1. p. 234 ; Nutt. gen. 1. p. 120 ; Torr. fl. 1. p. 216 ; Bigel. fl. Bost. p. 77 ; Beck, hot. 

 p. 289 ; Duby in DC. prodr. 8. p. 33. H. palustris, Pursh, Jl. 1. p. 120 ; Muhl. cat. p. 19. 



