OF SOUTH-EAST SIKKIM. 
397 
maturity. Phe flower is protandrous. In the early stage the stigma is a rounded knob 
2 min. in diameter ; the five anthers when ripe form a semicoherent mass round the style. 
Later the strong filaments begin to bend from the base and gradully the empty anthers are 
adpressed against the sides of the corolla lobes — a displacement of 2-- 3 cm. 
207. Pleurogjne Eschsch. 
646, Pleurogyne sikkimeiisis Burkill 
Changu, 12,000 ft., No. 4631 Ribu / 
208. Swertia Linn. 
547. Swertia dilatata C. B. Clarke 
Phadonchen, Changn, 7—11,000 ft., Nos. 4413, 4422. 
548. Swertia racemosa Wall. 
Gnatong, 11,000 ft., No. 4382. 
549. Swertia ramosa W. W. Smith. (Journ, Asiat. Soo. Beng., new 
series, vii, 77 with fig.) 
Karponang, 9,000 ft., Nos. 3032, 4539, Ribu ! Bare. 
550. Swertia Hookeri C. B. Clarke 
Changn, Chola, Ningbil, 12 — 13,000 ft., No. 8186. Common, 
551. Swertia Ringii Hook. f. 
Chongu, Ningbil, Gipmochi, 13— -13,500 ft. Nos. 4136, 4233. 
Petals greenish-white with bluish base. This species is later in flowering than ita 
allies in this area, as its flower-buds open about the middle of August. 
652. Swertia Burkilliana W. W. Smith (Journ. Asiat. Soc., Beng., 
new series, vii, 78 with fig.) 
Changu, Fieunggong, 12,000 ft.. Nos. 3556, 3872, 4244, 4376 
Ribtt^ ! 
553. Swertia ciiueata Wall. 
Gnatong, 12—13,000 ft., No. 4343. 
Sepals patent in bud, petals greenish without, bluish-white within, glands with long 
blue fimbrim. 
554, Swertia multicaulis Don 
Common in the Chola range, 13—15,000 ft. 
209, Malenia Borckh. 
565, Maleiiia eliiptica D« Don 
Changu, Gnatong, 8—13,000 ft., Nos, 4281, 4346» 
