GENTIANACEAE. 



of the corolla somewhat longer than the subulate calyx- segments, 2-3 times as long 

 as the linear-oblong lobes; capsule 8-10 mm. long. Coast of Nantucket, and at 

 Portsmouth, Va. Nat. from Europe. May-Sept. 



2. Erythraea Centaurium (L.) Pers. LESSER CENTAURY. BITTER-HERB. 

 BLOODWORT. (I. F. f. 2852.) Glabrous, 1.5 4 cm. high. Leaves oblong, obtuse, 

 the lower forming a basal tuft, 2.5-6 cm. long; stem leaves sessile or slightly clasp- 

 ing; flowers 12-16 mm. long, nearly sessile, in compound bracteolate cymes; 

 corolla-lobes obtuse, 5-6 cm. long, about as long as the calyx-segments and one- 

 third to one-half as long as the corolla-tube; stigmas oval. In waste places, N. S. 

 and Quebec to ID. Nat. Irom Europe. June-Sept. 



3. Erythraea pulchella (Sw.) Fries. BRANCHING CENTAURY. (I. F. f. 

 2853.) Glabrous, much branched, 0.7-2 dm. high. Leaves oval, ovate or lanceo- 

 late, the lower mostly obtuse, 6-16 mm. long; no basal tuft of leaves; flowers pink, 

 cymose-paniculate, all or nearly all of them pedicelled, 10-12 mm. long; tube of 

 the corolla 1^-2 times longer than the calyx-segments, its lobes oblong, obtuse, 

 3-4 mm. long; stigma oval. In fields and waste places, N. Y. to Perm, and Md. ; 

 also in the W. Indies. Nat. from Europe. June-Sept. 



4. Erythraea exaltata (Griseb. ) Coville. TALL OR WESTERN CENTAURY. 

 (I. F. f. 2854.) Glabrous, 1.5-4.5 dm. high, the branches few, erect. Leaves 

 oblong or linear-oblong, sessile, mostly acute at both ends, 1-2 cm. long, the basal 

 not tufted; flowers few, terminal and axillary, all slender-pedicelled, 12-16 mm. 

 long; tube of the corolla about one-third longer than the calyx-segments, the lobes 

 oblong, obtuse, 3-4 mm. long. In sandy soil, Neb. to Wyo., Wash., Ariz, and 

 Cal. May-Sept. 



Erythraea calyc6sa Buckl., a Texan species differing from this in its broader larger 

 obtuse corolla lobes, has been found as a waif in Mo. 



2. SABBAT1A Adans. 



Annual or biennial erect glabrous herbs, with opposite or sometimes verticillate 

 sessile or rarely petioled or clasping leaves, and terminal pink rose or white flow- 

 ers. Calyx 4-12-parted or -divided, the tube campanulate, sometimes very short, 

 the lobes or segments usually narrow. Corolla rotate, deeply 4-12-parted. Sta- 

 mens 4-12, inserted on the short tube of the corolla; filaments filiform, short; 

 anthers curved, revolute or coiled in anthesis. Ovary i-celled, the placentae in- 

 truded; style 2-cleft or 2 parted, its lobes filiform, stigmatic along their inner sides. 

 Capsule 2-valved, many-seeded. Seeds small, reticulated. [In honor of L. Sab- 

 bati, an Italian botanist.] About 14 species, natives of eastern N. Am. and Mex. 

 Besides the following, some 5 others occur in the southern U. S. 



Flowers normally 4~5-parted, sometimes o-y-parted. 

 Branches opposite. 



Style 2-parted to below the middle or nearly to the base; flowers white. 

 Leaves lanceolate or ovate, acute ; flowers 16-25 mm - broad. 



1. S. lanceolata. 

 Leaves linear-oblong or lanceolate, obtuse; flowers 12-18 mm. broad. 



2. S. paniculata. 

 Style 2-cleft to about the middle; flowers normally pink. 



Leaves linear-lanceolate, sessile; stem slightly 4-angled. 3. S. angnstifolia. 

 Leaves ovate, cordate-clasping; stem strongly 4-angled. 4. S. angularis. 

 Branches alternate, the lower sometimes opposite in Nos. 5 and 6. 



Calyx-segments foliaceous, longer than the corolla. 5. S. calycina. 



Calyx-segments linear or lanceolate, not longer than the corolla. 



Calyx-tube strongly 5-ribbed; flowers 2.5-5 cm - broad. 6. S, campestris. 

 Calyx-tube scarcely ribbed; flowers 2-4 cm. broad. 

 Calyx shorter than the corolla; style 2-parted. 



Flower pink with a yellow eye (rarely white); corolla-segments 



obovate. 7. S. stellaris. 



Flowers white, very numerous; corolla-segments spatulate or ob- 



lanceolate. 8. S. Elliottii. 



Calyx-segments filiform, as long as the corolla; style 2-cleft. 



9. 6". campanulata. 

 Flovrers normally 8-i2-parted, 3.5-6 cm. broad. 10. S. dodecandra. 



i. Sabbatia lanceolata (Walt.) T. & G. LANCE-LEAVED SABBATIA. (I. F. 

 f. 2855.) Stem somewhat 4-angled, 3-9 dm. high. Leaves 3~5-nerved, 2-5 cm. long, 



