Astragalus, Linnaeus (1753: 755), Linnaeus, 1753

Khan, Amjad, Ahmad, Mushtaq, Zafar, Muhammad & Shah, Sayed Afzal, 2022, Systematic significance of pollen morphology in rare endemic taxa of Astragalus L. (Fabaceae), Phytotaxa 561 (3), pp. 267-290 : 281

Pollen key to investigated species

1 Sub-prolate .........................................................................................................................................................................................7

+ Prolate................................................................................................................................................................................................ 2

2 Perforate to reticulate, polar diameter 28.75 µm........................................................................................................ A. amherstianus

+ Trizonocolporate, P/E ratio1.36..........................................................................................................................................................3

3 Reticulate to microreticulate, equatorial diameter 21.66 µm ............................................................................................. A. auganus

+ Reticulate............................................................................................................................................................................................4

4 Scabrate, P/E ratio1.47………………………………………….……… A. brahuicus

+ Tricolporate, length of pore 6.54 µm..................................................................................................................................................5

5 Perforate, length of colpi 25.00 µm............................................................................................................................. A. chorizanthus

+ Perforate to granulate .........................................................................................................................................................................6

6 Granulate, mesocolpium 22.91 µm ................................................................................................................................ A. commixtus

7 Microreticulate to perforate, P/E ratio1.29........................................................................................................................... A. hostilis

+ Perforate to reticulate, polar diameter 32.58 µm................................................................................................................................8

8 Isopolar, mesocolpium 23.33 µm .................................................................................................................................. A. kuramensis

+ Trizonocolporate, width of colpi 3.75 µm..........................................................................................................................................9

9 + Reticulate to microreticulate, equatorial diameter 22.91 µm ..................................................................................... A. psilacanthus

+ Perforate, width of pore 10.41 µm ..................................................................................................................................................10

10 Scabrate, polar diameter 29.16 µm............................................................................................................................ A. purpurascens

+ Trizonocolporate, mesocolpium 22.50 µm.......................................................................................................................................11

11 Granulate, equatorial diameter 25.41 µm ............................................................................................................................ A. stocksii