| Rubiaceae | |
Galium angustifolium subsp. angustifolium
| | | |
| Rubiaceae | |
Galium angustifolium var. angustifolium
| | | |
| Rubiaceae | |
Galium angustifolium var. bernardinum
| Hilend & J.T. Howell | Leafl. W. Bot. 1(12): 134 | 1934 |
| Rubiaceae | |
Galium angustifolium subsp. borregoense
| Dempster & Stebbins | Madroño 21(2): 88 | 1971 |
| Rubiaceae | |
Galium angustifolium var. diffusum
| Hilend & J.T. Howell | Leafl. W. Bot. 1(12): 134 | 1934 |
| Rubiaceae | |
Galium angustifolium subsp. foliosum
| (Hilend & J.T. Howell) Dempster & Stebbins | Madroño 21(2): 89 | 1971 |
| Rubiaceae | |
Galium angustifolium var. foliosum
| Hilend & J.T. Howell | Leafl. W. Bot. 1(12): 134 | 1934 |
| Rubiaceae | |
Galium angustifolium subsp. gabrielense
| (Munz & I.M. Johnst.) Dempster & Stebbins | Madroño 21(2): 90 | 1971 |
| Rubiaceae | |
Galium angustifolium subsp. gracillimum
| Dempster & Stebbins | Madroño 21(2): 90–92 | 1971 |
| Rubiaceae | |
Galium angustifolium subsp. jacinticum
| Dempster & Stebbins | Madroño 21(2): 92–93 | 1971 |
| Rubiaceae | |
Galium angustifolium subsp. nudicaule
| Dempster & Stebbins | Madroño 21(2): 94, f. 11 | 1971 |
| Rubiaceae | |
Galium angustifolium subsp. onycense
| (Dempster) Dempster & Stebbins | Madroño 21(2): 94 | 1971 |
| Rubiaceae | |
Galium angustifolium var. onycense
| Dempster | Brittonia 10(4): 189, f. 1e–f | 1958 |
| Rubiaceae | |
Galium angustifolium var. pinetorum
| Munz & I.M. Johnst. | Bull. Torrey Bot. Club 49(12): 357–358 | 1922 [1923] |
| Rubiaceae | |
Galium angustifolium var. pinetorum
| Munz & I.M. Johnst. | | |
| Rubiaceae | |
Galium angustifolium var. siccatum
| (W. Wight) Hilend & J.T. Howell | Leafl. W. Bot. 1(12): 135 | 1934 |
| Rubiaceae | |
Galium angustifolium var. subglabrum
| Jeps. | Man. Fl. Pl. Calif. 962 | 1925 |
| Rubiaceae | ** |
Galium angustifolium var. typicum
| Hilend & J.T. Howell | Leafl. W. Bot. 1(13): 154 | 1935 |