533 ORDER 95. GENTIAN ACEyE. 



8 G. Saponaria L. St. ascending or erect, smooth ; fls. clustered at the summit 

 and often in the axils ; Ivs. ovate-lanceolate to lauce-obovate, acutish, rough- 

 margined, narrowed to the subdasping base; cal. segm. lance-linear or spatulate, 

 about equaling the tube, half as long as the corolla ; cor. bright blue, lobes conni- 

 vent, ovate, open, twice (more or less) longer than the cleft folds. Va. to Ga. and 

 La. St. 8 to 18' high, slender or rather stout. Lvs. 1 to 2 to 3' long. Cor. 18" 

 to 2' long. Cal. segm. varying from lance-linear to lance-obovate ! Aug., Sept 



(3. LINEARIS. St. slender, ascending ; Ivs. linear and lance-linear, rigid ; cal. 

 segm. mostly linear ; cor. folds very short Can. to Car. and Ky. A common 

 form, so peculiar that we might as well perhaps regard it as a species. (G. 

 Pneumonanthe MX.) 



9 G. puberula MX. St. erect or ascending, slender, roujh, scarcely picberulent; 

 fls. clustered, rarely solitary ; Ivs. ovate and ovate-lanceolate, half-clasping, very 

 rough-edged, acute, short but longer than the internodes ; cal. segm. lanceolate, 

 about as long as its tube, half as long as the subcampanidate, bright blue corolla ; 

 cor. subfunnel-form, lobes acute, thrice longer than the cleft folds. W. and S. 

 States. Plant 10 to 18' high, very leafy and scabrous. Lvs. 9 7 to 20" long. 

 Fls. 15" long. It varies with leaves linear-lanceolato and less rough. (G. Cates- 

 bcei E1L) 



4. BARTO'KIA, Muhl. (Centaurella MX.) SCREWSTEM. (Dedi- 

 cated in 1801, by Dr. Muhlcnburg, to Bcnj. F. Barton, Prof, of Bot- 

 any, Philadelphia.) Flowers 4-mcrous ; sepals appressed ; corolla sub- 

 campanulate ; petals slightly united, nearly erect ; stigma thick, gland- 

 ulous, somewhat bifid ; capsule 1 -celled, 2-valved, invested by the per- 

 manent calyx and corolla; seeds very numerous and minute. "U N. 

 American, slender, erect herbs, with scale-like Ivs. and small white fls. 



1 B. verna Muhl. St. short, simple ; ped. \-flowered, the lower much longer, often 

 alternate ; cor. segm. spatulate, obtuse, thrice longer than the calyx ; ova. conical, 

 tipped with the distinct style. Bogs, Va. to Ga. Sts. 3 to 5' high, clustered. 

 Scales 1" long, as in the other, the fls. white, 3" long. March. 



2 B. tenella Muhl. St. branching above, branches subdivided; Ivs. subulate, 

 minute; pan. erect, many -flower ed ; pedicels subequal', sep. distinct, a third shorter 

 than the corolla; ova. ovate, sty. almost 0. A slender and nearly naked plant, 5 

 to 8' high, of a yellowish-green color, in wet grounds, Mass, to Ga. St. square, 

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

 Ped. simple or branched. Pedicels bracteato at base, 2 to 3" to 5" in length. 

 Cal. segm. linear-lanceolate, acuto. Cor. white, small, 1" long. Aug. 



(3. BUACHIATA. Branches and pedicels elongated, decurved, i. e., outwards and 

 upwards, and often alternate ; cor. more open, lobes very acute, twice longer 

 than the calyx. Southward (B. Moseri Steud.). 



5. FRA V SERA, Walt. COLUMBO. (In honor of John Fraser, an 

 American cultivator of exotics.) Flowers mostly tetramerous ; petals 

 united at- base, oval, spreading, deciduous, each with 1 or 2 bearded, or- 

 bicular glands in the middle ; style 1 ; stigmas 2, distinct ; capsule 

 compressed, 1-celled ; seeds few, imbricate, large, elliptic, margined. 

 2 Showy and tall, with opposite or verticillato leaves. 



F. Carolinensis Walt. St. tall, erect, glabrous, branched above ; tvs. oblong, 

 lanceolate, acutish, sessile, feather- veined, entire or wavy ; panicle compound, 

 pyramidal, leafy, verticillate ; cal. segments acute, shorter than the oblong, obtus- 



. ish petals ; gland solitary, oval-orbicular. Moist woods, Western N. Y., Wis. and 

 S. Car. Stem dark purple, 47 9f! high, perfectly straight, 1 2' thick at 

 base. Leaves smooth, subcarnous, 3 12' by 1 3', in whorls of 4 6, rarely 

 opposite. Petals greenish, with blue dots and a largo purple gland near the base. 

 June, July. Highly valued as a tonic. 



6. HALE V NIA, Borkh. FELWORT. (Derivation unknown.) Flowers 

 tetramerous ; corolla short-campanulate, petals spurred at base, with 



