| | 1. Stem hairs short below, conspicuously glandular above; style hairy; upper corolla lip ± = lower, 2-lobed, deeply hooded |
| A. lanceolata |
| | 1' Stem hairs 0 to long, if glandular then inconspicuously so; style glabrous; upper corolla lip < lower, entire, shallowly hooded |
| |
| | 2. Upper stamens sterile; anthers glabrous; South Coast, Peninsular Ranges (sw San Diego Co.) |
| A. ilicifolia |
| | 2' Upper stamens fertile; anthers hairy; Central Coast, San Francisco Bay Area, South Coast Ranges, Western Transverse Ranges |
| |
| | 3. Anthers pink-red; margins of upper leaves not spiny; stem generally unbranched; inflorescence generally terminal; Central Coast, San Francisco Bay Area |
| A. duttonii |
| | 3' Anthers cream; margins of upper leaves spiny; stem generally branched below; inflorescence terminal and axillary; San Francisco Bay Area, South Coast Ranges, Western Transverse Ranges |
| A. obovata |
| | 4. Hairs of stem and calyx 0 or short; bracts round or wider than long, cordate-clasping at base; c&s Outer South Coast Ranges, w&c Western Transverse Ranges (San Luis Obispo to Ventura cos.) |
| subsp. cordata |
| | 4' Hairs of stem and calyx short or long, some inconspicuously glandular; bracts generally longer than wide, obtuse or truncate at base; Inner South Coast Ranges (San Benito, Monterey cos.) |
| subsp. obovata
|