Aristida and Stipagrostis species, C. E. Hubbard, 1960

Maasoumi, Zahra, Pakravan, Maneezheh, Hamzee, Behnam & Zarei, Roghaieh, 2023, Leaf micromorphology and anatomy in the tribe Aristideae (Poaceae) in Iran and its systematic implications, Phytotaxa 578 (1), pp. 75-92 : 89

Identification key based on anatomical and micromorphological traits in Aristida and Stipagrostis species of Iran

1- Leaf U or open U shaped in transverse section ..................................................................................................................................2

- Leaf circle shaped in transverse section .............................................................................................................................................9

2- Leaf U shaped.....................................................................................................................................................................................3

- Leaf open U shaped............................................................................................................................................................................8

3- The cells of inner bundle sheaths are larger than the outer cells........................................................................................................4

- The cells of inner bundle sheaths are smaller than the outer cells .....................................................................................................6

4- Saddle shaped silica bodies absent .......................................................................................................................... Aristida abnormis

- Saddle shaped silica bodies present....................................................................................................................................................5

5- Abaxial epidermis without papilae.................................................................................................................... Aristida coerulescens

- Abaxial epidermis with papilae ......................................................................................................................... Aristida adscensionis

6- Leaf without kranz anatomy system................................................................................................................. Stipagrostis paradisea

- Leaf with kranz anatomy system........................................................................................................................................................7

7- Papilae presents on abaxial epidermis. Leaf without saddle shaped silicabodies ................................................ Stipagrostis cliliata

- Papilae absents on abaxial epidermis. Leaf with saddle shaped silica bodies.............................................. Stipagrostis pogonoptila

8- Papilae presents on abaxial epidermis................................................................................................................ Stipagrostis karelinii

- Papilae absents on abaxial epidermis .................................................................................................................. Stipagrostis barbata

9- Papilae presents on abaxial epidermis..............................................................................................................................................10

- Papilae absents on abaxial epidermis .................................................................................................................. Stipagrostis pennata

10- Sclerenchyma absents from abaxial side of median vascular bundle.................................................................... Stipagrostis obtusa

- Hood shaped sclerenchyma presents on abaxial side of median vascular bundle............................................................................11

11- Saddle shaped silica bodies are present on abaxial epidermis .......................................................................... Stipagrostis raddian a

- Saddle shaped silica bodies are absent on abaxial epidermis.............................................................................. Stipagrostis plumosa