gentianacejE. (gentian familt.) 355 



2. EUSTOMA, Don. 



Calyx bell-shaped, 4 - 5-parted, sharply 4 - 5-angled ; the lobes subulate, 

 keeled. Corolla tubular, 4-5-lobed, membranaceous at the base, withering- 

 persistent ; the lobes erect, lanceolate-oblong, acute. Stamens 4-5, partly 

 exserted, inserted on the middle of the tube of the corolla : anthers sagittate, 

 introrse, opening lengthwise. Style conspicuous, erect, persistent : stigmas 

 round-ovate, thick, at length spreading, with the margins revolute. Capsule 

 oblong, obtuse, 1-celled, the margins of the valves slightly inflexed. Placentae 

 spongy, sutural. Seeds minute, globose, sessile. — Herbs, with oblong glaucous 

 clasping leaves, and panicled showy purple or blue flowers. 



1. E. exaltatum, Griseb. Stem (2° -3° high) terete, glaucous, panicu- 

 lately forking above ; leaves mucronate, decurrent at the base, the upper ones 

 lanceolate ; flowers long-peduncled, terminating the branches, blue ; calyx-lobes 

 as long as the tube of the corolla, dilated and membranaceous at the base. — 

 South Florida. (J) — Corolla 1 2" - 1 5" long. 



3. GENTIANA, Tourn. Gentian. 



Calyx 4 - 5-parted. Corolla bell-shaped or funnel-shaped, 4 - 5-lobed, often 

 with plaited toothed appendages between the lobes. Stamens 4-5. Stigmas 

 2, sessile, compressed, persistent. Capsule 1-celled, 2-valved, many-seeded; the 

 seeds sutural, or covering the inner face of the valves. — Flowers showy, solitary 

 or clustered, axillary and terminal. 



* Annual: corolla funnel-shaped, destitute of appmxdages : anthers versatile : capsule 



sessile: seeds wingless. 



1. G. quinqueflora, Lam. Stem 4-angled, slender, branching; leaves 

 ovate or ovate-lanceolate, acute, cordate and slightly clasping at the base, 

 3 - 5-nerved ;. flowers 3-5, terminating the short branches ; corolla blue, rather 

 slender, naked in the throat ; with ovate bristle-pointed entire lobes, much 

 longer than the subulate calyx-lobes. — Dry soil along the mountains, Georgia, 

 and northward. Aug. and Sept. — Stem 10-2° high. Leaves I'long. Co- 

 rolla 1' long. 



2. G. crinita, Frcel. Stem terete below, the upper portion and branches 

 4-angled ; leaves lanceolate, acute, closely sessile, the lowest narrowed into a 

 petiole ; flowers terminal, on long angular peduncles ; calyx-lobes 4, ovate- 

 lanceolate, acute, strongly keeled, as long as the tube of the corolla ; lobes of 

 the corolla 4, rounded, fimbriate, nearly as long as the tube ; seeds scaly. — 

 Damp soil along the mountains, Georgia, and northward. Oct. and Nov. — 

 Stem l°-2° high, often much branched. Leaves l'-2' long. Corolla blue, 

 1 J' -2' long. 



* * Perennial : corolla bell-shaped, with plaitrd lon'hrd appendn,qes between the lobes : 



anthers erect, mostli/ connivent : capsule pedicelled : seeds coutmonli/ winged. 

 '3. G. oehroleuca, Froel. Stem low, smoothish ; leaves oblong or obo- 

 vatc-oblong, nan-owed at the base, the upper ones narrower and acute ; flowers 

 In a dense mostly terminal cluster ; corolla open, yellowish-white, ^ - J longer 



