ACANTHACEAE. 167 



13. AGALINIS Kaf. 1 Slender herbs. Leaf -blades linear or filiform, entire. 

 Flowers axillary. Calyx-lobes 5, often minute. Corolla tubular-campanulate, 

 pink or rose-purple: lobes all spreading, shorter than the tube. Style filiform. 

 Capsule globular. 



Plants perennial, with horizontal rootstocks : pedicels erect: corolla pink, no yel- 

 low lines within throat. 1. A. linifolia. 

 Plants annual, with fibrous roots : pedicels spreading : corolla 

 rose-purple, 2 yellow lines within throat. 

 Pedicels short : stem-leaves opposite. 



Stem smooth or sparingly scabrellous : axillary fascicles 



inconspicuous. 



Corolla 2.5-3.5 cm. long : flowers evidently pedicelled. 2. A. purpurea. 

 Corolla 1.5-1.7 cm. long : flowers nearly sessile. 3. A. Harperi. 



Stem scabrous : axillary fascicles conspicuous. 4. A. fasciculata. 



Pedicels long : stem-leaves alternate. 5. A. fllifolia. 



1. A. linifolia (Nutt.) Britton. Glabrous throughout: stems 5-9 dm. tall, 

 virgately branched: leaf -blades linear: pedicels 10-15 mm. long: calyx-lobes 

 minute: corolla 3-4 cm. long: capsule 6-8 mm. long. [Gerardia linifolia 

 Nutt.] Everglades and low pinelands. 



2. A. purpurea (L.) Pennell. Stems sparingly scabrellous, 3-9 dm. tall, wide- 

 branched: axillary fascicles shorter than leaves: leaf -blades linear, ofter nar- 

 rowly so, scabrous above: calyx-lobes triangular-lanceolate, 1-2.5 mm. long: 

 capsule 4-6 mm. long. [Gerardia purpurea L.] Everglades, hammocks, and 

 pinelands. F. K. 



3. A. Harperi Pennell. Stems smooth, 4-8 dm. tall, sparingly branched: leaf- 

 blades narrowly linear, scabrous above: calyx-lobes triangular-lanceolate to tri- 

 angular-subulate, less than 1 mm. long: corolla pale rose-purple: capsules 4-5 

 mm. long. Everglades. 



4. A. fasciculata (Ell.) Eaf. Stems 4-9 dm. tall, much-branched: leaf -blades 

 linear; axillary fascicles equalling leaves: pedicels 2-5 mm. long: calyx-lobes 

 triangular-lanceolate: corolla 2.5-3.5 cm. long: capsule 4-7 mm. long. [Ger- 

 ardia fasciculata Ell.] Everglades, pinelands, and coastal sand-dunes. 



5. A. filifolia (Nutt.) Baf. Stems 4-6 dm. tall, smooth, much-branched: leaves 

 filiform; axillary fascicles conspicuous, equalling the leaves: pedicels 10-35 mm. 

 long: calyx-lobes linear-subulate, less than 1 mm. long: corolla 2.5-3 cm. long: 

 capsule 4-5 mm. long. [Gerardia fllifolia Nutt.] Everglades and pinelands. 



14. BUCHNERA L. Erect herbs. Leaf-blades usually toothed. Flowers 

 spicate. Calyx-lobes 5, broad, much shorter than the tube. Corolla blue or 

 white, salverform: limb oblique. Style short. Capsule ovoid. 



1. B. elongata Sw. Stems 2-6 dm. tall, scabrous or hispidulous: blades of the 

 stem-leaves oblong to linear, 1.5-8 cm. long, entire or sparingly toothed: 

 calyx-lobes acute, the upper ones deltoid: corolla slightly hairy. Everglades 

 and low pinelands. F. K. (Bah., Cuba, Ant.) BLUE-HEARTS. 



FAMILY 12. ACANTHACEAE. ACANTHUS FAMILY. 



Herbs or shrubs. Leaves alternate, opposite, or whorled: blades 

 simple. Flowers perfect, irregular. Calyx of usually 5 partially united 

 sepals. Corolla of 5 partially united petals, 2-lipped or sometimes essen- 

 tially regular. Androecium of 4 didynamous or of 2 equal stamens, one 

 pair being abortive or obsolete. Gynoecium of 2 united carpels. Ovary 

 2-celled. Ovules commonly 2 in each cavity. Fruit a capsule, often with 

 a stipe-like base, the valves opening elastically. 



1 Contributed by Mr. F. W. Pennell. 



