1920] Ridley : Peninsular Siamese Plants. 107 



Allied to G. diversifolium King, but the flowers much 

 smaller than in most of this set and the lower Up unusually 

 deeply tri-lobed. 



216. Lepidagathis hyalina, Nees. 



Tasan : White, hood largely brown ; 6862 : Whitish, 

 hood spotted brown, lip crimson ; 6861. Distrib. India, S. 

 China, Malay Peninsula. 



217. Lepidagathis chlorostachya, Nees. 



Tasan : Whitish ; 6889 : Yellowish white, hood pale 

 brown ; 2 ft. ; 6917. Distrib. Mergui, Penang. 



218. Lepidagathis parviflora, Bl. 



Nam Chut : White, hp spotted crimson. Distrib. Siam, 

 Java. 



The specimen has more lanceolate and hairy leaves 

 than in type. 



219. Pseuderanthemum malaccense, Lindau. 



Tasan : Lilac ; 2 to 4 ft. ; 6837. Distrib. Malay Penin- 

 sula. 



220. Pseuderanthemum crenulatum, Nees. 



Tasan : Petals pink, white at centre ; 2 ft. ; 6921, (the 

 big form) . Klong Bagatae : Pale violet ; 2 to 4 ft. ; 6581. 

 Koh Pipidon : Lilac to mauve ; 1 to 1-5 ft. high ; 6541, (tlie 

 form with broad elhptic leaves, 7 in. long, 3-5 in. wide, 

 characteristic of this region to Perhs) . Tasan : white ; 

 6918, (the ordinary Malay Peninsula form). Distrib. 

 Burma, Cambodia to Malay Peninsula. 



221. Pseuderanthemum angustifolium, sp. nov. 



Stem erect, woody, 12 in. tall, little branched. Leaves 

 few at the base of the racemes, linear lanceolate-acuminate, 

 blunt coriaceous ; nerves 5 pairs, 2*75 in. long, -3 in. wide ; 

 petiole very short. Racemes slender 6 to 13 in. long, base 

 nude. Inflorescence 3 in. long, puberulous. Flowers 

 sohtary -25 in. apart, white. Bracts lanceolate -1 in. 

 Sepals very narrow, hnear-acuminate, • 12 in. long. Corolla- 

 tube slender, cylindric • 75 in. long, pubescent ; lobes oblong, 

 tip broad round '25 in. long. Stamens, tips only exsert. 

 Style very slender, filiform *75 in. long, pubescent. 



Koh Pipidon : Flowers white ; 6557. Quite unlike any- 

 thing I know in its few coriaceous narrow leaves and remote 

 pubescent flowers. 



222. Justicia purpurascens, sp. nov. 



Creeping and ascending herb. Stems ascending 6 to 7 

 in., hairy tomentose. Leaves ovate or oblong-ovate, acumi- 

 nate, base round, purple beneath ; nerves 6 pairs prominent 

 beneath, hairy on both sides ; midrib and nerves beneath 

 felted, 4 in. long, 2 in. wide, petiole 2 in. long, felted tomen- 

 tose, spike terminal, '5 to -25 in. long ; peduncle '75 in. 

 Bracts rhomboid ovate narrowed at both ends, hairy espe- 

 cially on edges, • 25 in. long and a little narrower. Flower 

 sessile. Sepals very narrow hnear filiform. Corolla tube 



