| Character | A. apachecum | A. blumeri |
|---|---|---|
| Shoot height, mean (maximum) | 4 (9) cm | 7 (18) cm |
| Shoot color | Yellow-green to reddish | Gray to straw or light green |
| Shoot habit | Densely clustered around host branch |
Not densely clustered around host branch |
| Lateral staminate spike length x width in summer |
6 x 1 mm | 11 x 2 mm |
| Staminate flowers | Usually 3- or 4-merous, rarely 5-merous |
Usually 4-merous, occasionally 3- or 5-merous, rarely 6-merous |
| Color of staminate lobes compared to shoots |
Same | Darker |
| Note: contributed by R.L. Mathiasen | ||