Flora of the Malayan Peninsiola. 681 



shorter (or scarcely longer) than the 2-lipped limb ; segments 

 imbi'icated (not twisted) in the bud. Stamens 2 ; anther-cells 2, one 

 below the other, tailed ; pollen ellipsoid, small, longitudinally ribbed 

 beside the stopples. Ovary 4-celled ; style shortly bifid. Capsule 

 regularly dehiscent ; 4-seeded (the placentas not springing elastically 

 from the base of the capsule), stalked with the seeds in the top, or 

 seed-bearing nearly from the base. Seeds ovoid, flattened, verrucose, 

 subtubercular, glabrous (except in Sect. Ehaphidospora). — Distrib. 

 Species 150, widely spread throughout the hot regions of the world. 



This genus is only artificially separated from several others (as from Leda 

 Adhntoda, Ptyssiglottis) by the white tail to the lower anther-cell. If this character 

 be not regarded as of generic importance, the number of species may be 300, as 

 in the arrangement by Lindau in Engl. & PrantI Pflanzenfam. 

 Sect. 1. Bkacteat.^:. Bracts (floral leaves) round, large, 

 strobilate at least in the young spikes : — 



Flowers mostly solitary under each bract (floral leaf) : — 



Corolla glabrous without, except a few hairs at the tip . . 1. <7. ptychostoma. 

 Corolla hairy without : — 

 Nerves of the leaves 6 to 7 pairs : — 

 Leaves mostly cuneate at the base .. ..2. J. puhiflora. 



Leaves rounded at the base . . . . . . 4. J. Scortechinii. 



Nerves of the leaves 10 to 11 pairs . . . . 3. J. patulinervis. 



Flowers 2 to 3 or more clustered under each bract : — 

 Bracts -5 in. long, including the petiole .. .. 5. J. subcymosa. 



Bracts -6 in. long, subsessile . . . . . . 6. J. selangorensis. 



Sect. 2. Calophanoides. Flowers axillary, cymose, solitary or 

 clustered ; without a terminal cyme or panicle. Corolla 

 small : — 

 Leaves opposite, subequal : — 



Leaves elliptic . . . . . . . . 7. J. quadrifaria. 



Leaves linear-oblong . . . . . . . . 8. J". Neesiana. 



Leaves apparently alternate, i.e. one of each pair or 

 minute, deciduous: — 



Leaves on the nerves beneath and stem nearly glabrous : — 



Herb, with long internodes . . . . . . 9. J. henicophylla. 



Much-branched shrub . . . . . . 10. J. suhalternans. 



Leaves on the nerves beneath and stem hairy . . 11. J. alternifolia. 



Leaves one of each pair reduced to a persistent ear . . 12. J. otophora. 



Sect. 3. Gendartjssa. Spikes terminal, and terminal on short 

 axillary branches ; bracts mostly narrow, the lowest rarely 

 imbricate : — 

 Leaves narrow-oblong or lanceolate : — 



Spikes dense; flowers clustered .. .. . . 13. J. Gendanissa. 



Spikes lax ; flowers mostly solitary ... . . 14. J. Maingayi. 



Leaves elliptic, large (5 to 8 in. long) : — 

 Peduncles short : — 

 Spikes linear, interrupted .. ..■ .. lb. J. vasculosa. 



