304 ACANTHACEiE. (acanthus family.) 



g. D. strepens, Nees. Smooth, pubescent, or hairy ; leaves varying from 

 lanceolate to orbicular, mostly narrowed into a petiole; flowers sessile or pedun- 

 elcd ; tube of the corolla barely longer than the linear or linear-lanceolate hairy 

 calyx-lobes, and about the length of the funnel-shaped throat ; capsule smooth. 

 (liuellia strepens, L.) — Dry rich soil, Florida, and northward. June - Sept. — 

 Stem 2' -3° high. Leaves l'-4' long. Corolla l'-2' long, blue or purple. A 

 polymorphous species. Later flowers sometimes fruiting in the bud. 



7. D. DOCtiflorus, Nees. Closely pubescent ; stem simple, rigid; leaves 

 oblong or lanceolate, sessile, entire or slightly toothed; flowers solitary, pednn- 

 eled ; corolla large ; the elongated tube twice as long as the linear hairy calyx- 

 lobes ; capsule pubescent — Low grassy pine barrens, Florida, Georgia, and 

 westward. July and Aug. — Stem 1° high. Corolla 2'- 4' long, white. 



3. DIANTHERA, Gronov. 



Calyx 5-parted. Corolla bilabiate ; the upper lip emarginatc ; the lower 3- 

 lobed, rugose or veiny in the middle, spreading. Stamens 2 : anther-cells sep- 

 arated, one placed lower down than the other. Stigma simple, acute. Capsule 

 flattened, narrowed downward, bearing the seeds above the middle. Seeds 

 mostly 4, supported by the appendages of the placenta. — Perennial smooth 

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

 long-peduncled axillary spikes. 



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



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

 (Justicia ensiformis, EU.t J. pedunculosa, Mic/tx.) — In slow-flowing streann-. 

 South Carolina, and northward. July and Aug. — 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-flowered, on simple peduncles shorter than the leaves; corolla small, 

 pale purple, the lower lip striped with deeper lines. (Justicia humilis, Mirhx.) — 

 Muddy banks of streams, Florida to South Carolina. — Leaves 2' -4' long, 

 l'-U' wide. 



Var. lanceolata. Stem taller (l°-lj°); leaves smaller, lanceolate, acu- 

 minate, nearly sessile ; peduncles longer than the leaves; spikes many-flowered, 

 1-sided, often branching. — River-banks, Florida. July. 



Var. ' angusta. Leaves linear or linear-lanceolate, reflexed, the lower ones 

 very remote; peduncles as long as the leaves; spikes several-Dowered, the 

 lower (lowers often opposite. — Fine-barren ponds, Florida. May. — Stem 1° 

 high. Leaves l ' - 2' long. Corolla 4" - 5" long. 



3. D. crassifolia, n. sp. Stem rigid, angled ; leaves fleshy, Hnear, chan- 

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

 than the leaves, exceeding the stem; spike i.« flowered; corolla large, bright 

 purple ; tbe tower lip striped witb deeper lines : capsule •-' seeded ; seeds circular, 

 smooth. --Wet pine barrens, Apalachicola, Florida. April and May. Stem 

 r>'- 12' high. Leaves i'- 6' long. Peduncles 4 - 9 long. Corolla and eaptule 

 1' long. 



