1(38 ACAXTHACEAE. 



Stems, and branches, clothed with sheathing scales. 1. Tubiflora. 



Stems, and branches, not clothed with scales. 

 Corolla convolute in the bud. 



Calyx-lobes bristle-like : anther-sacs armed or pointed at 



the base. 2. Dyschoriste. 



Calyx-lobes linear to lanceolate : anther-sacs pointless. 3. Rueli.ia. 



Corolla imbricate in the bud. 



Stamens 4 : anthers 1-celled. 4. Gerardia. 



Stamens 2 : anthers 2-celled. 5. Dianthera. 



1. TUBIFLORA J. F. Gniel. Eigid herbs. Flowers in terminal spikes. 

 Calyx-lobes 4 or o, the lateral ones the narrower. Corolla white or blue, 

 slightly 2-lippeil. 



1. T. angustifolia (Fernald) Small. Stems 2-6 dm. tall: basal leaves 4-31 

 em. long; blades linear, elongate linear-spatulate or narrowly oblanceolate : 

 bracts acuminate: corolla-lobes much shorter than the tube: capsules about 

 5 mm. long. — Everglades and low pinelands. 



2. DYSCHORISTE Nees. Herbs or woody plants: leaf -blades entire. 

 Flowers solitary or clustered in the axils. Calyx-lobes 5, very slender. Corolla 

 blue, purple, or rarely white, slightly 2-lipped. Capsules 2-4-seeded. [Calo- 

 phanes D. Don.] 



1. D. angusta (A. Gray) Small. Stems 1-2 dm. tall: leaves numerous; blades 

 1-2. .5 cm. long, sjmtulate below to linear-oblong or linear above: calyx-lobes 

 linear-subulate, 9-11 mm. long: corolla-limb about 10 mm. wide: capsules 7-8 

 mm. long. [C. angusta A. Gray.] — Pinelands. — F. K. 



3. RUELLIA [Plum.] L. Caulescent herbs. Leaf-blades entire or 

 toothed. Flowers axillary or sometimes in terminal clusters. Calyx 5-lobed, 

 the lobes narrow. Corolla nearly regular. Capsules 6-20 seeded. 



Plants diffuse, with decumbent stems and branches : calyx-lobes bristly pubescent 



and ciliatt-. 1- It.lnihrida. 



Plants erect, with erect virgate branches : calyx-lobes glabrous 



or with remote cilia. 2. B. sticculenta. 



1. R. hybrida Pursh. Stems 2-6 dm. long, often diffusely spreading, pubes- 

 cent. l>ut green: leaf-blades oblong to oblong-lanceolate, 3-10 cm. long: 

 calyx hirsute; lobes linear-filiform, 1.5-20 mm. long: corolla light-blue, 4-5 cm. 

 long. — Pinelands. — F. K. 



2. R. succulenta Small. Stems 1.5-5 dm. tall, inconspicuously puberulent: 

 leaf -blades narrowly oblong to spatulate, 2.5-4.5 cm. long: calyx sparingly 

 ciliate or glabrous; lobes linear-filiform, 13-16 mm. long: corolla deep pur- 

 plish-blue, about 4 cm. long. — Everglades. 



i. GERARDIA L. Mostly scapose herbs. Leaves mainly basal. Flowers 

 in terminal spikes. Calyx-lobes 5, nearly equal. Corolla with slightly unequal 

 broad spreading lobes. [Stenandrium Nees.] 



1. G. floridana (A. Gray) Small. Plants 2-6 cm. tall: leaf -blades ovate to 

 oblong or oval, 2-3 cm. long: calyx-lobes linear-subulate, becoming 9-11 mm. 

 long: corolla rose-purple, 16-20 mm. long: capsules 9-12 mm. long. [S. 

 floridanum (A. Gray) Small.] — Pinelands. 



5. DIAH"THERA [Gronov.] L. Caulescent herbs. Leaf -blades entire or 

 rarely toothed. Flowers on axillary peduncles. Calyx-lobes 4 or 5, narrow or 

 slender. Corolla strongly 2-]ippeil : ujijior lip entire or 2dobed; lower lip 

 3-lobed. 



1. D. crassifolia Chapm. Stems 2-4 dm. tall: leaf-blades linear, usually nar- 

 rowly so, or spatulate near the base of the stem, 3-15 cm. long, fleshy: calyx- 



