Tên Khoa học: Schizostachyum langbianense Tran V.T. & N. Xia
Tên tiếng Anh:
Tên tiếng Việt: Nứa lang bi an
Tên khác:

tìm thấy ở Đỉnh Langbiang, huyện Lạc Dương, tỉnh Lâm Đồng, Việt Nam.

3.1.1. Long hairs (L)

Long hairs are narrow, long and one celled hairs. They are usually found on the epidermis covers but widely distributed over the completely lower epidermis of some species (S. funghomii, S. nghianum, S. hainanense, C. langbianense, S. ninhthuanense and S. yalyense). However, long hairs are abundant in S. yalyense.

3.1.2. Geniculate hairs (G) (bicellular hairs)

Geniculate hairs arise from the derivatives of the short epidermal cells (Wu, 1962), which are usually broken off by external forces and distributed on the lower epidermis covering the sclerenchyma region. They situated on the lower epidermis of some species (S. sp2, S. sp3, S. hainanense, S. langbianense, S. ninhthuanense, S. pseudolima, s. mekongense and S. yalyense). However, long hairs are abundant in S. yalyense.

3.1.3. Spines hairs (S)

Spines hairs are short, spine – like cells, which are rounded at the base and acute at the apex (Wu, 1962). They are usually dense present on both surfaces over sclerenchyma region in some species (S. hainanense, S. langbianense, S. ninhthuanense, S. mekongense), but sparse in S. yalyense, S. funghomii and S. pseudolima.

3.2. The stomata and papillae

The stomata of all species on the lower epidermis are larger, elliptical in shape and arranged in 2 – 5 rows on each side of a vein. Each stoma covers finger – like protuberances (papillae) which come forth from the epidermal cells next to the epidermal cells, incline towards the center of stoma (Wu, 1962). There are obvious variations in papillae forms and distributional patterns around the stomatal apparatus amongst the examined genera, and their significance is to indicate taxonomic value (Wu, 1962; Yang et al., 2008). There are usually four triangular papillae overarching each individual stomata apparagus in all species, but otherwise, S. langbianense, S. aciculare, characterized by having four triangular papillae overarching each individual stomata apparatus and surrounded. However, four triangular papillae overarching each individual stomata apparatus are unequal in length amongst species. There are two types:

- The triangular papillae overarching are surrounded, which found in S. dullooa, S. nghianum, S. ninhthuanense and S. yalyense;

- The triangular papillae overarching are long, which found in some other species.