| Stem length |
60–90 cm |
30–40 cm |
30–60 cm |
| Color of leaf sheaths |
green, lower ones somewhat purple |
purple |
green, lower ones somewhat purple |
| Leaf petiole |
nearly absent at lower leaves, slightly elongated to 5 mm on upper leaves |
absent |
ca 6–10 mm long. |
| Indumentum of abaxial surface of laminae |
pubescent |
pubescent |
puberulent |
| Inflorescence |
lax, pendent, 5–12 cm long, peduncle 1–1.5 cm long beyond leaf sheaths |
lax, pendent, 4–5 cm long, peduncle 3–4 mm long beyond leaf sheaths |
dense, erect, 6 cm long, peduncle is surrounded by bracts and leaf sheaths |
| Bracts |
reflexed, ovate, pale green, pubescent on both sides, densely ciliate |
held at ca 90° to rachis, lanceolate, green with purple tinge, pubescent on both sides, densely ciliate |
enclosing the inflorescence, ovate, green, puberulent on both sides, sparsely ciliate |
| Cincinni |
straight, rachilla up to 4 cm long, peduncle of cincinni 8–12 mm |
straight, rachilla 1.5–2 cm long, peduncle of cincinni 6–7 mm |
arched, rachilla ca 2 cm long, peduncle of cincinni 4 mm |
| Bracteoles |
conduplicate alone their keels, forming an equitant structure |
conduplicate alone their keels, forming an equitant structure |
not conduplicate, with the base clasping the above remaining part of cincinni and upper part leaning towards flowers |
| Size of lowermost bract |
ca 35 × 15 mm |
12–20 × 3–5 mm |
25–30 × 10–15 mm |
| Ovary |
pubescent, smooth |
pubescent, verrucose |
pubescent, later verrucose |
| Lateral staminodes length |
nearly the same as lateral corolla lobe |
nearly the same as lateral corolla lobe |
ca 1/2 longer than lateral corolla lobe |
| Calyx |
ca 5 mm long |
ca 3 mm long |
ca 5 mm long |
| Pedicel |
fully enclosed by bracteole |
not fully enclosed by bracteole |
fully enclosed by bracteole |
| Appendages |
six, including a smaller appendage between the two larger appendages on each side, distal pairs being similar to proximal in size |
four, distal pairs being broader than proximal at base |
four, distal pairs being broader than proximal at base |
| Chromosome numbers |
2n=48 (Li & Chen 2008) |
2n=32 (Larsen 1972) |
2n=80 (Lim 1972b) |