| Ilex ? | MAKS0331 |
| Ilex buergeri Miq. | MAKS1266 |
| Ilex chinensis Sims | MAKS1270 |
| Ilex chinensis Sims ? | MAKS0462 |
| Ilex crenata Thunb. | MAKS0333, MAKS0334, MAKS1216, MAKS1217, MAKS1218, MAKS1278 |
| Ilex integra Thunb. | MAKS0301, MAKS1221, MAKS1282 |
| Ilex latifolia Thunb. | MAKS0295, MAKS0297, MAKS1271, MAKS1276 |
| Ilex leucoclada (Maxim.) Makino | MAKS0302 |
| Ilex macropoda Miq. | MAKS1252 |
| Ilex macropoda Miq. f. pseudomacropoda (Loes.) Hara | MAKS1248 |
| Ilex micrococca Maxim. | MAKS1268 |
| Ilex nipponica Makino | MAKS1277 |
| Ilex pedunculosa Miq. | MAKS0323, MAKS0324, MAKS1222 |
| Ilex rotunda Thunb. | MAKS0322, MAKS0325, MAKS0326, MAKS0328, MAKS0330, MAKS1219 |
| Ilex rugosa Fr. Schm. var. stenophylla (Koidz.) Sugimoto | MAKS0303, MAKS0304 |
| Ilex rugosa Fr. Schmidt | MAKS0305, MAKS1214 |
| Ilex serrata Thunb. | MAKS0283, MAKS0284, MAKS1215 |
| Ilex serrata Thunb. var. argutidens (Miq.) Rehder | MAKS0281, MAKS0282, MAKS0285 |
| Illicium anisatum L. | MAKS0052 |
| Impatiens balsamina L. | MAKS1233 |
| Impatiens noli-tangere L. | MAKS1230 |
| Impatiens textori Miq. | MAKS1231 |
| Imperata cylindrica (L.) Beauv. | MAKS2446 |
| Indigofera decora Lindl. | MAKS1163 |
| Inula britannica L. subsp. japonica (Thunb.) Kitam. | MAKS0442, MAKS1304 |
| Inula britannica L. subsp. linariaefolia (Turcz.) Kitam. | MAKS1000 |
| Inula ciliaris (Miq.) Maxim. | MAKS0999 |
| Inula salicina L. var. asiatica Kitam. | MAKS1294 |
| Iris ensata Thunb. var. spontanea (Makino) Nakai | MAKS2195 |
| Iris gracilipes A. Gray | MAKS2190 |
| Iris japonica Thunb. | MAKS2192 |
| Iris lactea Pallas var. chinensis (Fischer) Koidzumi | MAKS0766 |
| Iris rossii Baker | MAKS0764 |
| Iris sanguinea Hornem. | MAKS0765 |
| Iris sp. | MAKS0767, MAKS2191, MAKS2193 |
| Iris tectorum Maxim. | MAKS0762 |
| Isachne globosa (Thunb.) O. Kuntze | MAKS2476 |
| Ischaemum anthephoroides (Steud.) Miq. | MAKS2423, MAKS2523, MAKS2524, MAKS2526 |
| Ischaemum aristatum L. var. glaucum (Honda) T. Koyama | MAKS2521, MAKS2522, MAKS2525, MAKS2527 |
| Itea japonica Oliver | MAKS0464, MAKS1951 |
| Ixeris debilis A. Gray | MAKS0573, MAKS1025 |
| Ixeris dentata Nakai | MAKS0468 |
| Ixeris repens (L.) A. Gray | MAKS0574 |
| Ixeris stolonifera A. Gray | MAKS0581, MAKS1026 |
| Ixeris tamagawaensis (Makino) Kitam. | MAKS0575 |
