Mesona~\ labiat^e. 275 



base. Calyx veiy small at first, about 2 lines long when in fruit. Lower 

 lobe of the corolla hairy outside. 



At Say wan, Wilford. Not known from elsewhere, unless it be a variety of M. Wallichiana, 

 Benth., from Silhet and Assam. Tiie latter is, however, a coarser and more hairy plant, and 

 the leaves are always acuminate, and have much shorter petioles. 



2. POGOSTEMON, Desf. 



Calyx equally 5 -toothed. Corolla Avitli a short tube ; the limb somewhat 

 2-lipped, the upper lip 3-lobed, the lower lip entire and somewhat longer. 

 Stamens 4, nearly equal, exserted, the filaments often bearded. Anthers termi- 

 nal, 1-celled. — Herbs. Plowers in dense clusters or false-whorls, arranged in 

 terminal spikes or close panicles. 



A rather considerable tropical Asiatic genus. 



1. P. parviflorus, Benth. in DC. Prod. xii. 152. Stems decumbent at 

 the base, ascending to 2 ft. or more. Leaves ovate or oval-oblohg, more or 

 less toothed, usually 2 to 4 in. long, on rather long petioles, tliin and glabrous 

 or slightly pubescent. Flowers small, in dense globular clusters, surrounded 

 by ovate or oblong pubescent bracts nearly as long as themselves, and arranged 

 in somewhat broken and one-sided spikes forming terminal panicles. Calyx 

 pubescent, nearly 2 lines long. Hairs of the filaments purplish. 



On Mount Parker, Champion. Common in the hilly districts of India, from the Nilgher- 

 ries to Upper Assam. 



3. DYSOPHYLLA, Blume. 



Characters of Pogostemon, except that the corolla is more regular, the 

 lobes being equal or nearly so, and the false-whorls of small flowers are in a 

 single close cylindrical slender spike. 



A small genus from tropical Asia, which ought perhaps to be united with Poyostemon. 



1. D. auricularia, Blume ; Benth. in DC. Prod. xii. 156; IJlyht, Ic. 

 ^.1445. A procumbent perennial, hirsute in every part with spreading hairs, 

 usually of a yellowish-brown. Stems often 2 or 3 feet long. Leaves sessile 

 or very shortly stalked, 1| to 2 in. long, ovate-oblong or almost lanceolate. 

 Spike dense, but narrow, 2 to 4 in. long, composed of very numerous false- 

 wdiorls of small flowers. Calyx less than a line long. 



In ditches and moist \A-dces, C//ampio>i. Abundant in India, from Ceylon and the Peninsula 

 to the Archipelago, and northwards to the Himalaya and south China. 



4. PSEILLA, Linn. 



Calyx campanulate, 5 -cleft, becoming when in fruit 2-lipped, with an en- 

 larged tube, the upper lip 3-toothed, the loAver 2-cleft. CoroUa with a short 

 tube, the limb shortly 5 -cleft, the lowest lobe rather the longest. Stamens 

 4, not exserted, nearly straight. Anthers 2-celled. Nuts globidar, reticulate. 

 — Annuals. Mowers solitary and pedicellate, in the axils of the opposite 

 bract-like floral leaves, forming terminal or axillary racemes. 



A small tropical or subtropical Asiatic genus. 

 Plant hairy. Leaves about 2 in., deeply toothed, ])ur])lc underneath . . \. P. arf/u/a. 

 Plant whitish-hoary or glabrous. Leaves not 1 in., slightly toothed . . 2. P. Janceolnta. 



T 2 



