| 1 |
Aerial stem elongated, internodes longer than the stipules |
|
(2) |
| + |
Aerial stem not elongated, internodes shorter than the stipules |
|
(16) |
| |
|
|
|
| 2 (1) |
Fruit unilocular |
|
(3) |
| + |
Fruit partly or completely bilocular |
|
(5) |
| |
|
|
|
| 3 (2) |
Wing shorter than the keel |
|
Astragalus tribulifolius |
| + |
Wing equal to or longer than the keel |
|
(4) |
| |
|
|
|
| 4 (3) |
Claw of the keel more than half the blade (claw c.4-5 mm; blade c. 5-6 mm long) |
|
Astragalus hendersonii |
| + |
Claw of the keel less half the blade |
|
Astragalus heydei |
| |
|
|
|
| 5 (2) |
Fruit sessile |
|
(6) |
| + |
Fruit stipitate |
|
(9) |
| |
|
|
|
| 6 (5) |
Fruit rostrate, valve only slightly pushed inward,
10-12-seeded (Fig.) |
|
Astragalus amherstianus |
| + |
Fruit not rostrate, partially bilocular, more than
20-seeded |
|
(7) |
| |
|
|
|
| 7 (6) |
Fruit with only 1 type of hair |
|
(8) |
| + |
Fruit with 2 type of hairs (appressed and erect)(Fig.) |
|
Astragalus bakaliensis |
| |
|
|
|
| 8 (7) |
Fruit hairs long and spreading |
|
Astragalus eremophilus var. eremophilus |
| + |
Fruit hairs short, appressed |
|
Astragalus eremophilus var. falcinellus |
| |
|
|
|
| 9 (5) |
Stipe of the fruit longer than the calyx |
|
(10) |
| + |
Stipe of the fruit shorter than the calyx |
|
(14) |
| |
|
|
|
| 10 (9) |
Stipules not foliaceous, deciduous |
|
(11) |
| + |
Stipules foliaceous, persistent |
|
(12) |
| |
|
|
|
| 11 (10) |
Leaflets pubescent on both sides |
|
Astragalus coluteocarpus var. coluteocarpus |
| + |
Leaflets glabrous on adaxial side |
|
Astragalus coluteocarpus var. glaber |
| |
|
|
|
| 12 (10) |
Fruit septum less than 1 mm broad, leaflets
21-41 |
|
(13) |
| + |
Fruit septum more than 1 mm broad, leaflets 13-17,
occasionally up to 23 |
|
Astragalus falconeri |
| |
|
|
|
| 13 (12) |
Fruit glabrous |
|
Astragalus hoffmeisteri var. hoffmeisteri |
| + |
Fruit pilose, at least when young |
|
Astragalus hoffmeisteri var. pilous |
| |
|
|
|
| 14 (9) |
Fruit 14-24-seeded |
|
(15) |
| + |
Fruit 6-8-seeded |
|
Astragalus subumbellatus |
| |
|
|
|
| 15 (14) |
Entire plant (including fruit) pilose |
|
Astragalus scorpiurus var. scorpiurus |
| + |
Entire plant (including fruit) glabrous |
|
Astragalus scorpiurus var. glaber |
| |
|
|
|
| 16 (1) |
Fruit unilocular, leaflet c. 6 mm or less long;
vexillum c. 8-10 mm long |
|
Astragalus heydei |
| + |
Fruit sub-bilocular, leaflets 7 mm or more long;
vexillum c. 18 mm or more long |
|
(17) |
| |
|
|
|
| 17 (16) |
Peduncle (5)-8-10 cm long, raceme 8-20-flowered;
leaflets 4-15 mm broad |
|
Astragalus mirabilis |
| + |
Peduncle 3-7 cm long, raceme 3-8-flowered; leaflets
2-3 mm broad (Fig.) |
|
Astragalus gahiratensis |
