Oholaria. GENTIANACE^. 127 



9. HAL^NIA, Borkh. {John HaJen,yv\\o 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, G to 18 inches high : radical leaves obovate or spatulate 

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

 sepals lanceolate or sjiatulate 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 

 c.ornicidata, Michx. Fl. i. 97, not L. S. dejie.ra, Smith in Rees. Cycl. .S*. Michauxiana, Roem. 

 & 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. 156. — Newfoundland and Labrador. //. heterantha, 

 Griseb. 1. c, & Hook. 1. c. t. 15G, 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, Rothtock. 



10. BARTONIA, 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. Centaurella, Michx. Fl. 

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



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

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

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

 form. — Willd. 1. c. ; Gray, Man. ed. 5, 389. Sayina Virginica, L. Centaurella panicitlata, 

 Michx. 1. c. 1. 12, fig. 1. C. autumnuUs, Pursh, Fl. i. 100 ; Griseb. 1. c. Centaurhun autumnale, 

 Pers. Syn. i. 137. Andrewsia autumnalis, Spreng. 1. c. Centaurella Moseri, 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, somewhat corymbosely 1-few-flowered, the stem 

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

 obtuse, thrice the length of the calyx: ovary compressed. — Centaurella verna, Michx. I.e. 

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

 dreii'sia verna, Spreng. 1. c. — Bogs, S. Virginia to Florida and Louisiana; flowering in early 

 spring. 



11. OB OL ARIA, L. (X)^oX6g, 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. cd. 1, 21, t. 2 ; Bart. Fl. Am. Sept. in. t. 90; Renter in DC. Prodr. 

 xi. 45; Gray, 1. c, & Man. ed. 5, 390. Orobanrhe Vinjiniann, 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. 



