Obolaria. GENTIAN ACE^. 127 



9. HALENIA, Borkh. (John Halen, who wrote of Kamtschatka plants.) 

 Low herbs (of N. Asia and America) ; with opposite leaves, and small terminal 

 and axillary often panicled cymes of usually 4-merous flowers ; the corolla whitish, 

 bluish, or yellowish. Occasionally or in some flowers the spurs or nectariferous 

 gibbosities are wanting or nearly so. 



H. deflexa, Griseb. Annual, to 18 inches high : radical leaves obovate or spatulate 

 and pctioled ; cauline oblong-lanceolate to ovate, acute, 3-5-nerved (an inch or so long) : 

 sepals lanceolate or spatulate and acuminate : corolla dull whitish or purplish, 3 or 4 lines 

 long; the lobes triangular-ovate and acute; spurs deflexed or obliquely descending, thick- 

 ish, considerably shorter than the corolla. Gent. 324 ; Hook. Fl. ii. G7, t. 155. Swertia 

 corniculata, Michx. Fl. i. 97, not L. S. deflexa, Smith in Rees. Cycl. S. Michauxiana, Hoein. 

 & Sch. Syst. vi. 130. Damp and cool woods, N. Maine and New York to Lake Superior 

 and northern Rocky Mountains, Labrador, &c. 



Var. Brentoniana, a depressed form, with rather shorter and thicker spurs. H, 

 Brentoniana, Griseb. 1. c. ; Hook. 1. c. t. 150. Newfoundland and Labrador. //. hcterantha, 

 Griseb. 1. c., & Hook. 1. c. 1. 156, also Newfoundland, appears to be nearly the same, with 

 some corollas spurless. 



H. Rothrockii, Gray. Annual, a span or two high, loosely flowered : leaves linear : 

 pedicels slender : sepals linear-lanceolate : corolla bright yellow, 4 or 5 lines long ; the 

 lobes ovate; spurs divaricate and slightly ascending, shorter than the corolla. Proc. Am. 

 Acad. xi. 84; Rothrock in Wheeler Rep. t. 21. Arizona, on Mount Graham, Rothrock. 



10. BAHTONIA, Muhl. (Prof. Benjamin Smith Barton, of Philadelphia, 

 one of the earliest teachers of botany in the U. S.) Small and filiform annuals 

 or biennials, of Atlantic U. S. ; with fibrous root, simple or paniculately branch- 

 ing stems, leaves reduced to subulate appressed scales or bracts, and small pedun- 

 culate scattered flowers with white corolla. Willd. in N. Schrift. Berl. iii. 144 

 (1801) ; Torr. Fl. 185 ; Benth. & Hook.' Gen. ii. 818. Ceiitaurella, Michx. Fl. 

 i. 97, 1803. Andrewsia, Spreng. Syst. i. 428. 



B. tenella, Muhl. A span to a foot high, rather rigid : flowers racemose or racemose- 

 panicled, barely 2 lines long : lobes of the yellowish-white corolla oblong, little longer 

 than the calyx (sometimes twice as long) : ovary 4-angled and the cell somewhat cruci- 

 form. Willd. 1. c. ; Gray, Man. ed. 5, 389. Sayina Vinjuiica, L. Centaurella paniculata, 

 Michx. 1. c. 1. 12, fig. 1. C. aulumnalis, Pursh, Fl. i. 100 ; Griseb. 1. c. Centanriiun autumnale, 

 Pers. Syn. i. 137. Andrewsia autumnalis, Spreng. 1. c. Centaurella Mos'eri, Steud. Nom. ; 

 Griseb. in DC. Prodr. ix. 121, an occasional form, with leaves or scales and branches mostly 

 alternate. Open woods, Newfoundland to Wisconsin and Louisiana ; flowering late. 



B. Verna, Muhl. A span high or less, corymbosely or racemosely 1-9-flowered, the stem 

 weaker or less rigid : lohes of the white corolla obovate-spatulate, 3 or 4 Hues long, very 

 obtuse, thrice the length of the calyx : ovary compressed. Centaurella verna, Michx. 1. c. 

 fig. 2 ; Griseb. 1. c. C. vernalis & C.cestivalis, Pursh, 1. c. Centauriuin vernum, Pers. 1. c. An- 

 drewsia verna, Spreng. 1. c. Bogs, S. Virginia to Florida and Louisiana ; flowering in early 

 spring. 



11. OBOLARIA, L. (OpoAo's, a small Greek coin, from the rounded 

 leaves.) Gray, Chloris, 21, t. 3. Single species. 



O. Virginica, L. Herb a span or less in height from a tufted fibrous perennial root, of 

 dull purplish-green hue and rather fleshy texture, simple or sparingly branched above : lower 

 leaves reduced to obtuse loose scales ; upper ones cuneate-obovate, about half inch long 

 and wide : flowers usually in threes and nearly sessile in the axils and terminating the stem 

 and branches, white or purplish, 4 lines long, produced in spring. Spec. ii. 632 (Gronov. 

 Virg.) ; Darl. Fl. Cest, ed. 1, 21, t. 2 ; Bart. Fl. Am. Sept. iii. t. 90; Reuter in DC. Prodr. 

 xi. 45; Gray, 1. c., & Man. ed. 5, 390. Orobanche Virginiana, etc., Moris. Hist. iii. 504, sect. 

 12, 1. 16, fig. 23 ; Pluk. Aim. t. 209, fig. 6. Moist woods, New Jersey to Illinois and south 

 to Georgia and Texas. 



