310 Flora of the Malayan Peninsula. 



Perak : Larut, Scortechini n, 1544 ! Goping, King's Collector 987 I 

 1059 ! — DisTRiB. Assam, Tenasserim, Chitfcagong, Java, Borneo, 

 Philippines. 



The three gatherings from Perak agree with each other in every respect. They 

 differ from the plant as it occurs in Tenasserim, in having a more v?idely urceolate 

 corolla and even longer and more lanceolate sepals ; at the same time they differ 

 from the plant as it occurs in the Malay Archipelago, in having the sepals narrowly 

 lanceolate and acuminate, instead of ovate and sub-acute. As regards corolla, 

 however, they are exactly like the species as it occurs elsewhere in Malaya. Since 

 the Perak plant combines the characters of the two previously recognised species — 

 L. Wallichii with long acuminate sepals and L. fiavescens with wide-urceolate coroUa — ■ 

 it appears to afford conclusive proof of the suggestion already made by Clarke, I.e., 

 that the Assamese and the Malayan plants are no more than forms of one somewhat 

 variable species. An Indian form occurs in Travancore ; this has been characterised 

 by Stapf as a distinct species, L. leiocalyx, probably quite justly, since the Travancore 

 plant has quite glabrous and obtuse sepals : the same form occurs in Chittagong ; 

 otherwise, however, the Indian plant agrees with the forms reported from Indo-China 

 and Malaya. 



Ipomcea, Linn. 



Herbs, rarely shrubs, twining or prostrate, less often sub-erect or- 

 erect. Leaves alternate, entire lobed or divided. Floiuers axillary,. 

 solitary or in cymes, the cymes rarely paniculate, or in terminal spikes ; 

 bracts various. Sepals 5, ovate or linear, equal or unequal. Corolla 

 campanulate or infundibuliform ; limb plicate, very slightly 5-lobed.. 

 Stamens 5, included or very rarely exserted ; filaments filiform or 

 dilated at the base, often somewhat unequal ; anthers straight or con- 

 torted ; pollen spinulose. Ovary 1-3-celled, rarely 4-celled ; ovules 4^ 

 rarely 6 ; style filiform ; stigma capitate, entire or 2-3-globose, rarely 

 stigmas 2, linear. Fruit a 4-6-valved capsule, rarely indehiscent. Seeds 

 4, less often 6, rarely solitary, glabrous, bearded, or uniformly velvety 

 or woolly. — Distrib. Species about 300, throughout the tropics. 



Leaves softly pubescent or densely hirsute on both surfaces : — 



Leaves deeply 5-7-lobed; flowers densely capitate with a 



whorl of involucrant bracts . . . . . . 1. I. Pes-Tigridis.. 



Leaves entire or slightly 3-lobed ; flowers in congested 



cymes, with often one of the bracts foliaceous . . 2. I. Leari. 



Leaves glabrous or only slightly hirsute or pubescent : — 



Leaves all deeply 5- or more-lobed, glabrous : — 



Leaves digitately 5-lobed, lobes nearly if not quite 

 distinct at the base; flowers more or less white .. 3. I. pulchella. 



Leaves palmately 5-7-lobed, lobes not as a rule more 

 than three-fourths cut to the base ; flowers purplish- 

 pink . . . . . . . . . . 4. J. 2)aniculata.. 



Leaves entire or slightly obed or if (rarely) deeply lobed the 



lobes only 2 : — 

 Flowers in few-flowered axillary cymes : — 



Cymes corymbose and lax or flowers 2 or solitary : — 



