48 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. P. geminiflorus. 
*** Leaves of the upper part .of the plant having a long petiole. Male 
spadix with numerous slender pendulous branches. Male flowers 
very small, ovate, acute. 
3. P. dubius Becc—Malay Peninsula. 
B. Male flowers having membranous calyx and cartilaginous corolla. Male spa- 
dives forming large panicles with divaricate branches and scorpioid spikelets. 
Leaflets with smooth nerves. (Fruit unknown.) . 
* Leaflets unequidistant but not distinctly grouped. Male flowers 5 mm. 
long. 
4. P. paradoxus Becc—Pegu. 
** Leaflets in small groups. with long vacant spaces. interposed. Male 
flowers 3 mm. long. 
5, P. floribundus Becc—Indo-China. 
Description or PLATE II A. 
Figs. 1—8. | Plectocomiopsis geminiflorus  Becc.—Fig. 1. Portion of a male 
flower bearing branchlet with not fully developed flowers.—Fig. 2. Section of a 
male flower showing the androecium entire.—Fig. 3. Section of a male flower 
through the middle of the androecium.—Fig. 5. Section of a female flower show- 
ing the staminal urceolum (including the ovary) entire.—Fig. 6. The same as 
fig. 5. but with the urceolum cut through the middle, showing the ovary entire.— 
Fig. 7—8 Anthers of the female flower, front and back view. All figures enlarged. 
Figs. 9—14. Plectocomiopsis Wrayii Becc.—Fig. 9. Male flower.—Fig. 10. Fe- 
male flower.—Fig. 11. Section of a female flower showing the ovary entire.— 
Fig. 12. Longitudinal section of a male flower.—Fig. 13—14. Anthers from a male 
flower, back and side view. All figures enlarged. 
Figs. 15—21. Plectocomiopsis paradoxus Bece.—Fig. 15—17. Male flowers.— 
. Fig. 18. Longitudinal section of the corolla and androecium.—Fig. 19. Back view 
of half androecium.—Figs. 20—21. Stamens. All figures enlarged 6 diameters. 
1. PLECTOCOMIOPSIS GEMINIFLORUS Becc. in Hook. f. Fl. Brit. Ind. vi, 479. 
Calamus geminiflorus Griff. ex Mart. Hist. Nat. Palm. iii, 338; Gritf. Palms 
Brit. Ind. 70, t. 199A. 
Plectocomia geminiflora H. Wendl. ex Hook. f. l. c. 
Calamus turbinatus Ridley, Mat. Fl. Mal. Penins. ii, 212! 
Description.—A strong climber. Sheathed stem of the upper part of the 
flowering plant 3—4 cm. in diameter, terete or nearly so, in young plants more 
or less trigonous. Leaf-sheaths obliquely truncate and with thin dry lacerated 
borders at the mouth, light straw coloured when dry, glabrescent or very slightly 
scurfy, sprinkled with scattered conical spines, usually very short or also tuber- 
culiform, but at times (apparently in middle aged vigorous plants) very unequal, 
