GENTIANACEJE. 305 LIMN ANTHEMUM. 



Swamps, N. York, rare. Stem 3—5 feet high, obtusely 4-angled, the sides 

 grooved, branching. Leaves smooth, 6—12 inches long and nearly i as wide, 

 peduncles 1-flowered, axillary. Sepals linear-lanceolate, acute. Petals 

 acuminate, greenish yellow, sprinkled with purple spots, the gland in the 

 centre oval and covered with cilice. Anthers large, yellow. Style shorter 

 than the stamens, persistent, crowning the flattened capsule. Seeds 6 — B. 

 Torr. Highly valued as a tonic. July. Bien. American Coluvibo 



5. CENTAURE'LLA. 



Flowers tetramerous; sepals appressed ; corolla subcam- 

 panulate ; petals slightly united, nearly erect; stigma thick, 

 glandulous, somewhat bitid ; capsule 1-celled, 2-valved, invest- 

 ed by the permanent calyx and corolla; seeds many. 



Name a Lat. diminutive of Centaurea. 



C. PANICULA'TA. Mx. Bartonia paniculata. JlWt. 



Stem smooth, branching above, branches subdivided ; leavs subulate, 

 minute; panicle erect, many-flowered; calyx equaling tJie corolla; style 

 much shorter than the ovary. A slender and nearly naked plant, 5 — 8 inches 

 high, of a yellowish green color. Native in wet grounds. Stem square, 

 often twisted, with very minute, bract-like leaves, which are mostly opposite. 

 Peduncles opposite or terminal, simple or branched. Pedicels bracteate at 

 base, ^ inch in length. Calyx segments linear-lanceolate, acute, shorter than 

 the oval segments of the corolla. Corolla white, small, bearing the stamens 

 at its clefts. Aug. Ann. Screw-stein. 



6. ERYTHR.S:'A. 



Flowers pentamerous; corolla funnel-form, with a short, 

 spreading limb ; anthers after tiowering, spiral; style 1, erect, 

 bearing 2, roundish stigmas; capsule linear, l-celled. 



Gr. iQv^Qoi, red; from the color of the flowers. 



E. CENTAU'RIUM. Pcrs. E. pulchellum. Hoo/c .«* 



Stem erect, nearly simple ; leaves ovate-oblong ; floioers subsessile, fascicu- 

 late-panicukito ; calyx half the length of the corolla tube. Dry grounds, 

 Northern States. Stem 8—12 inches high. Flowers bright purple, in 

 fascicles near the top of the stem. July. Aug. Ann. Beck. 1 am unac- 

 quainted with this plant, but, from Dr. Beck's account of it, should suppose 

 it quite loo near Gentiana. 



7 . L I M N A' N T H E M U M . 

 Calyx 5-paited; corolla subcampanulate, with a short lube 

 and spreading, 5-lobed limb, deciduous, segments obtuse; 

 stamens 5, alternating with 5 glands ; capsule 1-cellcd, without 

 valves; placenta; fleshy, many-seeded. 



Gr. XiiUvi), a lake, ai;&o«, a flower; from its aquatic habits. Herbs, sub- 

 mersed generally in stagnant water. Leaves floating. Corolla induplicate 

 in ffistivation. 



L. LAC UNO's A. Gmel. Villarsialac. P. V. aquatica. K. 4" 5?. V. trachysporma, il&. 



Floating; leaves reniform, subpeltate, scabrous above, spongy and lacunose 



beneath ; fiowers umbellate, from the summit of the stem (petiole ?) ; corolla. 



