| Name | Description |
|---|---|
| aggregatus |
joined in clusters, apparently larger ones |
| agraria |
growing in fields |
| agrarius |
growing in fields |
| agrostis |
grassy |
| aizoon |
evergreen |
| alata |
winged |
| alatus |
winged |
| albella |
almost white |
| albellus |
almost white |
| albens |
whitened |
| albescens |
whitening, turning white |
| albicans |
becoming white, not quite white |
| albida |
whitish |
| albidula |
whitish |
| albidulus |
whitish |
| albidum |
whitish |
| albidus |
whitish |
| albina |
whitish |
| albinum |
whitish |
| albinus |
whitish |
| albissima |
whitest |
| albissimus |
whitest |
| albocaerulescens |
white becoming light blue |
| albocinereus |
ash white |
| albofuscescens |
white becoming dusky |