| 1 |
Capitula on short axillary branches
|
(2)
|
| 1 + |
Capitula terminal at ends of stems and lateral branches
|
(3)
|
| 2 (1) |
Capitula 3-10, in corymbiform synflorescences; leaves ovate to elliptic-lanceolate, triplinerved.
(A. nitidus)
|
|
| 2 (1) + |
Capitula solitary at ends of second-year axillary branches; leaves oblanceolate, pinnately veined.
(A. hersileoides)
|
|
| 3 (1) |
Leaves linear.
(A. lavandulifolius)
|
|
| 3 (1) + |
Leaves ovate, ovate-lanceolate, elliptic, oblong, oblong-lanceolate, or oblanceolate
|
(4)
|
| 4 (3) |
Capitula in corymbiform synflorescences or solitary at ends of lateral branches
|
(5)
|
| 4 (3) + |
Capitula in terminal compound corymbiform synflorescences
|
(6)
|
| 5 (4) |
Leaves adaxially arachnoid or glabrate, abaxially white tomentose, margin entire or 1- or 2-serrate-spinose; capitula 1-3 on branches.
(A. hypoleucus)
|
|
| 5 (4) + |
Leaves adaxially verruculose, abaxially with white arachnoid hairs, margin entire; capitula 3-20 in corymbiform synflorescences.
(A. polius)
|
|
| 6 (4) |
Pappus straw-colored, sometimes purplish; leaf margin entire or remotely serrulate to coarsely serrate, adaxial surface eglandular or rarely sparsely glandular.
(A. albescens)
|
|
| 6 (4) + |
Pappus dirty white; leaf margin entire, adaxial surface ± glandular
|
(7)
|
| 7 (6) |
Leaves (4-)6-9 cm, both surfaces sparsely strigillose, glabrate, or glabrous, abaxially glossy between minor veins.
(A. fulgidulus)
|
|
| 7 (6) + |
Leaves 1-4 cm, adaxially moderately scabridulous, abaxially gray-white arachnoid-tomentose or cottony.
(A. argyropholis)
|
|
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