366 ACANTHACE.E. (ACANTHUS FAMILY.) 



herbs, with opposite entire leaves, and short-bracted mostly alternate flowers 

 iu loug-peduucled axillary spikes. 



1 . D. Americana, L. Stem tall, angled ; leaves long, liuear-lanceolate ; 

 spikes oblong, dense or somewhat capitate, on peduncles as long as the leaves. 



In slow-tiowiug streams. July -August. Stem 2 high. Leaves and 

 peduncles 4' -6' long. Spike \' long. Flowers pale purple. 



2. D. OVata, Walt. Stem low (4'- 8' high), 4-angled ; leaves ovate-lance- 

 olate, rather acute, narrowed into a short petiole ; the lowest small, lanceolate ; 

 spikes 3- 4-nowered, on simple peduncles shorter than the leaves; corolla 

 small, pale purple, the lower lip striped with deeper lines. (Justicia humilis, 

 Michx.) Muddy banks of streams, Florida to South Carolina. Leaves 

 2' -4' long, 1'- 1-J' wide. 



Var. lanceolata, Chapm. Stem taller (1- 1^) ; leaves smaller, lance- 

 olate, acuminate, nearly sessile ; peduncles longer than the leaves ; spikes 

 mauy-flowered, 1-sided, often branching. River banks, Florida. July. 



Var. ? angUSta, Chapm. Leaves linear or linear-lanceolate, reflexed, the 

 lower ones very remote ; peduncles as long as the leaves ; spikes several- 

 flowered, the lower flowers often opposite. Tine barren ponds, Florida. 

 May. Stem 1 high. Leaves 1'- 2' long. Corolla 4" - 5" long. 



3. D. crassifolia, Chapm. Stem rigid, angled ; leaves fleshy, linear, 

 channelled ; the lower distant, small and obtuse ; peduncles stout, erect, longer 

 than the leaves, exceeding the stem ; spike few-flowered ; corolla large, bright 

 purple ; the lower lip striped with deeper lines ; capsule 2-seeded ; seeds cir- 

 cular, smooth. Wet pine barrens, Florida. April -May. Stem 6' -12' 

 high. Leaves 4' -6' long. Peduncles 4' -9' long. Corolla and capsule 1' 

 long. 



8. DICLIPTERA, Juss. 



Calyx 5-parted, mostly leafy-bracted. Corolla bilabiate, mostly reversed ; 

 the lower lip 3-lobed ; the upper 2-cleft or entire. Stamens 2 : anther cells 

 equal, one placed behind the other. Capsule oblong or oval, bearing 2 or 4 

 seeds below the middle ; the partitions at length free from the valves. Herbs, 

 with brandling stem, and purple, scarlet, or white flowers in axillary and ter- 

 minal heads or spike-like cymes. 



1. D. brachiata, Spreng. Smooth or nearly so ; stem 6-angled ; leaves 

 thin, oblong-ovate, acuminate, abruptly contracted into a long and slender 

 petiole ; spikes solitary or 2 -3 together, interrupted, unequal ; bracts oblong, 

 mucronate, narrowed at the base, at length inflated ; corolla small, purple. 



River banks, Florida to North Carolina. July -August. Stem l-2 

 high. 



2. D. assurgens, Juss. Smooth or minutely pubescent ; stem angled ; 

 leaves elliptical, acute, on slender petioles; flowers mostly single, scattered in 

 1 -sided spike-like cymes; bracts small; calyx lobes subulate, unequal ; corolla 

 (scarlet) curved, nearly equally 2-lipped; anthers slightly exserted ; style 

 elongated. South Florida. Stem l-2 high. Leaves l'-2' long. Co- 

 rolla 9" -12" long 



