1086 ACANTHACEAE 



lobes narrowly lanceolate, as long as the tube or longer : corolla red or crimson, 2-2.5 cm. 

 long, curved ; lips nearly as long as the tube or much shorter : capsules 7-8 mm. long. 

 In sand, Florida. Also in the West Indies and Central America. Throughout the year. 



2. Diapedium brachiatum (Pursh.) Kuntze. Foliage glabrous or sparingly pilose. 

 Stems 3-7 dm. tall, with wide-spreading branches : leaf-blades ovate to oblong-ovate, 2-10 

 cm. long, acute or somewhat acuminate, undulate, slender-petioled : bracts obovate to 

 oblong-spatulate, more or less strongly mucronate, 4-8 mm. long : calyx 4-5 mm. long ; 

 lobes linear-subulate: corolla pink to purj^le, 1.5-2 cm. long; lips about as long as the 

 tube, the upper one 3-toothed : capsules about 5 mm. long. 



In dry soil, North Carolina to Florida and Texas. Summer and fall. 



3. Diapedium attenuatum (A. Gray) Heller. Similar to D. brachiatum in habit. 

 Stems more or less branched and spreading, 4-8 dm. long : leaf-blades lanceolate or ovate- 

 lanceolate, 4-8 cm. long, markedly acuminate, slender-petioled : bracts acuminate or cuspi- 

 date-acuminate : calyx 2-3 mm. long ; lobes subulate : corolla pinkish purple, about 1 cm. 

 long : capsules 4-5 mm. long. 



On prairies, Arkansas and eastern Texas. Summer and fall. 



8. ANISACANTHUS Nees. 



Shrubs, with glabrous or pubescent foliage. Leaves opposite, often clustered : blades 

 broadest below tlie middle, entire. Flower-spikes terminal, one-sided, interrupted. Calyx 

 sessile : lobes 5, narrow, nearly equal, acute or acuminate. Corolla red or purplish : tube 

 slender, elongated, straight or slightly curved, dilated above, 2-lipped : upper lip narrow, 

 entire : lower lip 3-parted. Stamens 2, as long as the corolla or longer : filaments adnate 

 to above the middle of the tube : anthers 2-celled. Staminodia wanting. Ovary 2-celled. 

 Stigmas capitate. Ovules 2 in each cavity. Capsule contracted into a long stipe-like base. 

 Seeds 4, flat, wrinkled, orbicular. 



1. Anisacanthus Wrightii (Torr. ) A. Gray. Foliage puberulent or glabrate. 

 Stems 6-12 dm. tall, branching : leaf-blades lanceolate, to oblong- or ovate-lanceolate, 2-5 

 cm. long, acute or acuminate, abruptly narrowed into short slender petioles or rounded at 

 the base : racemes slender, panicled : calyx 4-5 mm. long ; lobes oblong to oblong-lanceo- 

 late, longer than the tube : corolla purplish red or vermilion, 3-4 cm. long ; lips shorter 

 than the tube, the ujaper one notched, the lower 3-cleft ; lobes narrow : capsules 2 cm. long, 

 stipe-like base longer than the acute body. 



In rich soil or thickets, Texas. Spring to fall. 



9. SIPHONOGLOSSA Oersted. 



Shrubs or shrubby herbs, with diffiise stems. Leaves opposite : blades entire. Flow- 

 ers solitary in the axils. Calyx sessile or nearly so : lobes 4, narrow. Corolla white, blue 

 or purple, 2-lipped : tube slender, elongated, terete : upper lip entire or 2-cleft : lower lip 

 spreading, 3-lobed. Stamens included or at least surpassed by the upper lip : filaments ad- 

 nate to the throat of the corolla-tube : anthers 2-celled, the sacs unequally inserted, one 

 lower. Staminodia wanting. Ovary 2-celled. Stigmas slightly 2-lobed. Ovules 2 in 

 each cavity. Capsule contracted into a solid stipe-like base. Seeds 4 or fewer. 



Corolla 1-2 cm. long : calyx 3-6 mm. long. 



Foliage glabrous or nearly so : calyx 3 mm. long : corolla less than 15 mm. long. 1. S. Dipteracaniha. 



Foliage pilose-hirsute: calyx 5-6 mm. long : corolla over 15 mm. long. 2. S. Pilosella. 



Corolla 3-4 em. long : calyx 7-9 mm. long. 3. S. longiflora. 



1. Siphonoglossa DipteracAntha (Nees) Heller. Stems branched at the base, the 

 branches ascending or spreading, 5-30 cm. long, slender, nearly glabrous : leaf-blades 

 oblong, varying to somewhat obovate or ovate, or sometimes |.oval, 3-12 cm. long, obtuse 

 often obscurely toothed, glabrous or sparingly pubescent beneath and ciliate near the base, 

 short-petioled : bracts oblong or nearly so : bractlets oblong-spatulate : calyx about 3 mm. 

 long ; lobes linear-lanceolate, acute or somewhat acuminate, ciliolate : corolla pale purple 

 or white, 12-13 mm. long ; tube about twice as long as the lips, pubescent above the 

 middle, the upper lij) notched, the lower lip with obtuse lateral lobes : capsules 5-6 mm. 

 long. 



In sandy soil, southeastern Texas and adjacent Mexico. Spring and summer. 



2. Siphonoglossa Pilos611a (Nees) Torr. Stem branched at the base, the branches 

 pilose-hirsute, 3-20 cm. long : leaf-blades s])atulate to oval or ovate or sometimes elliptic, 

 1-1.5 cm. long, obtuse or acute, narrowed into short petioles or nearly sessile: calyx 5-6 



