Flora of the Malayan Peninsula. 



367 



distinct. Calyx 2-partite ; lobes entire or nearly so, often accrescent. 

 Corolla 2-lipped ; upper lip entire or emarginate ; lower larger 

 3-6-lobed ; tube with a straight or curved spur. Stamens 2, adnate to 

 base of corolla, alternate with lobes of lower lip ; filaments broad ; 

 anthers ovate, 2-celled, or by confluence almost 1-celled. Carpels 

 connate in a globose 1-celled ovary ; ovules many, on a central 

 placenta ; style short ; stigma unequally 2-lobed. Capsule globose, 

 regularly 2-4-valved, or opening irregularly. Seeds many, small ; 

 albumen 0. — Distkib. Species 150, in most countries. 



Leaves many, submerged, scattered, divided into numerous capil- 

 lary segments mostly interspersed with bladders ; calyx-lobes 

 equal or nearly so ; pedicels not winged : — 



Flowers yellow to pale-yellow or nearly white : — 



Peduncles very slender ; flowers usually two, never more 

 than three, always under -25 in. across ; pedicels in fruit 

 erect : sometimes the capillary leaves absent . . . . 1. TJ. exoleta. 



Peduncles stout ; flowers usually more than three, and 

 always from -35 to -5 in. across ; pedicels reflexed in fruit 

 and thickened under the calyx .. .. ..2. U. flexuosa. 



Flowers blue or red or pink ; pedicels erect in fruit . . S. U. punctata. 



Leaves few, rosulate at base of stem : — 



Leaves hnear or linear-spathulate, usually absent at time of 

 flowering ; calyx-lobes equal or nearly so ; seeds not glochi- 

 diate : — 



Scales of the scape and bracts attached by their bases : — 

 Stems erect : — 

 Flowers yellow ; pedicels in fruit distinctly winged 

 Flowers pink, purple, or violet, rarely white with lilac 

 markings : — 



Pedicels in fruit slightly winged ; sometimes a few 

 leaves still present at time of flowering ; stems 8 to 

 12 in. high, stoutish 



Pedicels in fruit capillary, short, wingless ; leaves 

 at time of flowering ; stems 2 to 3 in. high, very 

 slender 

 Stems twining ; flowers yellow : — 



Stems slender, leaves absent at time of flowering ; lower 

 lip less than '25 in. wide 



Stems stouter ; leaves forming matted masses ; lower 

 lip over -3 in. wide . . 

 Scales of the scape and bracts produced downward below 

 point of attachment : — 



Flowers on distinct pedicels as long as the fruiting calyx 

 or longer ; capsule longer than fruiting calyx-lobes ; flowers 

 pink (Ridley) 



Flowers almost or quite sessile ; capsule hidden by the 

 fruiting calyx-lobes : — 



Flowers few, scattered on the very slender scapes ; ) 10. U. racemosa 

 corolla white . . . . . . . . J var. filicaulis. 



4. TJ. bifida. 



TJ. affinis 

 VAR. Griffitliii. 



6. TJ. minutissima. 



7. TJ. Wallichiana. 



8. TJ. involvens. 



9. TJ. verticillata. 



