Leonurus.] labiate. 279 



merous ; the lower false- whorls axillary and distant, the upper forming a long 

 terminal spike. Bracts and calyx-teeth subulate, almost prickly. Corolla 

 about 5 lines long, pubescent outside. 



On roadsides, Champion and others. Probably of Asiatic origin, now a very common 

 roadside weed over the greater part of tropical and temperate Asia, tropical Africa, and some 

 parts of tropical America. 



11. LEUCAS, Br. 



Calyx usually 10 -ribbed, straight or oblique at the top, 10- or rarely 8- 

 toothed. Corolla-tube not exserted ; the upper lip erect, concave, and very 

 hairy, the lower spreading, 3-lobed, with a large often notched middle lobe. 

 Stamens 4, ascending in pairs under the upper lip. Anther-cells divaricate, 

 confluent. Nuts obtuse at the top. — Herbs or undershrubs. Flowers usually 

 white, rarely purple, in axillary false-whorls or terminal spikes. 



A considerable genus, confined to the tropical or subtropical regions of the Old World. 



1. L. mollissimum, Wall.; Benth. in DC. Prod. xii. 525. A peren- 

 nial, with decumbent or ascending pubescent or hairy stems, 1 to 2 ft. 

 long. Leaves ovate, crenate, i to 1 in. long, softly hairy, pale or white un- 

 derneath. False- whorls all axillary and distant, 10- or more flowered. Bracts 

 minute. Calyx 3 lines long, straight, pubescent, with 10 very short erect 

 subulate teeth. 



On roadsides, Little Hongkong, Champion ; also Hance and Wright. On the adjacent 

 continent, and frequent in the mountains of northern India. 



12. TEUCRIUM, Linn. 



Calyx 5 -toothed, either regular or the upper tooth much broader. Corolla- 

 tube short ; 4 upper lobes short, erect, or turned forwards ; the lowest lobe 

 much larger, spreading, often concave. Stamens 4, in pairs, exserted between 

 the 2 uppermost lobes of the corolla. Nuts attached laterally near the base, 

 more or less reticulate. — Herbs or shrubs, varying much in inflorescence. 



A large genus, widely distributed over most parts of the globe. 



False-whorls 6- to 10-flowered, in a simple terminal spike. Calyx in- 

 flated after flowering . . . 1. T. inflatum. 



Flowers in pairs, in one-sided terminal racemes or panicles. 



Plant slightly hairy. Petioles rather long. Calyx inflated after 



flowering 2. T. stoloniferum. 



Plant very hairy. Petioles short. Calyx not inflated . . . . 3. T. quadrifarium. 



1. T. inflatum, Sw.; Benth . in DC. Prod. xii. 581. A pubescent or 

 hairy perennial, with a creeping rhizome and erect stems 1 to 2 ft. high. 

 Leaves shortly stalked, ovate or ovate-lanceolate, 2 to 3 in. long, hoary un- 

 derneath. Flowers (pale purple?) in whorls of 6 to 10, collected into a sim- 

 ple terminal leafless spike of 3 or 4 in. Calyx much inflated after flowering, 

 contracted at the mouth ; the teeth ovate and obtuse, the uppermost much 

 broader. 



In waste places, Hance. A tropical American species, but abundant also in the Feejee 

 and Friendly Islands, in the Pacific, and in some islands of the eastern Archipelago. 



2. T. stoloniferum, Ham.; Benth. in DC. Prod. xii. 583. Rhizome 

 perennial, with creeping stolones. Stems erect, 1 to 2 ft. high ; the whole 

 plant glabrous or pubescent. Leaves on rather long petioles, broadly ovate, 



