Table 1.

Comparative morphological characteristics of Astragalus Chehreganii, A. Hakkianus, and A. kuzehrashensis

Characteristic	A. chehreganii	A. hakkianus	A. kuzehrashensis
Stipule	Thinly membranous	Chartaceous	Hyaline at the apex, thicker toward the base
Stipule length	6–10 mm	10–14 mm	16–23 mm
Petiole length	1–3 mm	2–6 mm	1.5–5 mm
Rachis indumentum	Appressed to subappressed hairs	Ascending hairs	Appressed to subappressed hairs
Leaflet shape	Narrowly elliptic	Elliptic-obovate	Narrowly elliptic
Leaflet indumentum	Appressed to subappressed hairs	Subappressed to ascending hairs	Appressed to subappressed hairs
Peduncle length	9–22 cm	7–13 cm	13–20 cm
Peduncle indumentum	Sparser and longer at the top, appressed-subappressed hairs	Mixed indumentum, tangled and ascending hairs	Sparsely hairy at the top, longer at the base, appressed-subappressed hairs
Peduncle hair length	0.1–0.5 mm	0.5–1.5 mm (up to 3.5 mm)	0.6–1.5 mm
Bract indumentum	Glabrous or sparse, occasionally at the base	Sparse at the apex, ascending hairs	Densely hairy at the apex, appressed hairs
Inflorescence shape	Globose	Globose to elliptic	Elliptic to ovoid
Inflorescence length	3–3.5 cm	3–5 cm	3.5–6 cm
Calyx indumentum	Densely hairy	Short tangled hairs mixed with long ascending hairs	Densely hairy, appressed-subappressed hairs
Standard length	16–19 mm	14–17 mm	17–19 mm