GENUs 1. GENTIAN FAMILY. 3 
4. Centaurium exaltatum (Griseb.) W. F. Wight. 
Tall or Western Centaury. Fig. 3333. 
er i exaltata Griseb. in Hook. Fl. Bor. Am. 2: 69, pl. 157.' 
1834. 
Erythraea Douglasii A. Gray, Bot. Cal. 1: 480. 1876, 
Erythraea exaltata Coville, Contr. Nat. Herb. 4: 150. 1893. 
C. exaltatum W. F. Wight, Contr. Nat. Herb. 11: 449. 1906. 
Annual, erect, glabrous, branched, 6’-18’ high, the 
branches few, erect, slender. Leaves oblong or linear- 
oblong, sessile, mostly acute at both ends, 5-10” long, 
distant, the basal not tufted; flowers few, terminal and 
axillary, all slender-pedicelled, 6-8” long; tube of the 
corolla about one-third longer than the calyx-segments, 
the lobes oblong, obtuse, 14’”’-2” long. 
In sandy soil, western Nebraska to Wyoming, Washington, 
Arizona and California. May-Sept. 
5. Centaurium texénse (Griseb.) Fernald. 
Texan Centaury. Fig. 3334. 
ae a texensis Griseb; Hook. Fl. Bor. Am. 2: 58. 
cy eco Fernald, Rhodora 10: 54. 1908, 
Annual, corymbosely branched above, slender, 2’-8’ 
high. Stem-leaves linear gr linear-lanceolate, 8” 
long or less, acute, sessile, the upper ones reduced 
to subulate bracts; pedicels slender, as long as the 
calyx or longer; calyx 4’-5” long, its lobes subulate; 
corolla light rose color, its tube longer than the 
calyx, its acute oblong to oblong-lanceolate lobes 
about half as long as the tube; capsule longer than 
the calyx. 
In rocky soil, Missouri to Texas. May-—Sept. 
p 
6. Centaurium calycésum (Buckley) Fernald. Buck- 
ley’s Centaury. Fig. 3335. 
Erythraea calycosa Buckley, Proc. Acad. Phil. 1862: 7. 1863. 
Centaurium calycosum Fernald, Rhodora 10: 54. 1908. 
Annual, corymbosely branched or sometimes simple, 2° high 
or less, the branches ascending or spreading. Leaves oblong 
to spatulate or linear, 4’-13’ long, acute, sessile; pedicels as 
long as the calyx or longer; calyx 4’’-5” long, its lobes nar- 
rowly linear; corolla pink, its tube a little longer than the . 
calyx, its oval or oblong obtuse lobes nearly as long as the 
tube. - 
In wet or moist soil, Missouri to Texas, Mexico and New Mexico. 
April-June. 
2. SABBATIA Adans. Fam. Pl. 2: 503. 1763. 
Annual or biennial erect usually branched glabrous herbs, with opposite or sometimes 
verticillate sessile or rarely petioled or clasping leaves, and rather large terminal and solitary 
or cymose pink rose or white flowers. Calyx 4-12-parted or -divided, the tube campanulate, 
sometimes very short, the lobes or segments usually narrow. Corolla rotate, deeply 4-12- 
parted. Stamens 4-12, inserted on the short tube of the corolla; filaments filiform, short; 
