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Key to Lamiaceae

Lamiaceae

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1 Fruit a fleshy drupe; plant a small tree, shrub, or sprawling vine; mature stems terete or obscurely 4-sided (by secondary growth).
(c) Wong, Michelle - CC-BY
  2 Flowers zygomorphic; palmately (3-) 5-7 (-9) foliolate or simple (V. rotundifolia); [subfamily Viticoideae]
  2 Flowers essentially actinomorphic; leaves simple.
    3 Stems pubescent with dendritic hairs; inflorescence axillary; calyx 0.5-2 mm, lobes diminutive to nearly obsolete
    3 Stems glabrous or pubescent with simple (unbranched) hairs; inflorescence terminal (rarely only axillary); calyx lobes conspicuous or diminuitive.
      4 Corolla 5-40 mm long; calyx 5-18 mm, the lobes conspicuous, the calyx length often surpassing the fruit when mature; [subfamily Ajugoideae]
      4 Corolla 2-5 mm long; the calyx lobes inconspicuous and not surpassing the mature fruit; [subfamily Premnoideae]
(c) Gwaltney, John
1 Fruit a schizocarp of 4 dry mericarps; plant either an herb or a shrub to 5 (-20) dm tall; mature stems usually distinctly 4-sided (sometimes terete or obscurely 4-sided).
(c) Ward, Scott G
        5 Calyx with either a distinctly enlarged protuberance on the upper surface, or the upper lobe expanded and “cap-like”.
          6 Calyx with 5 lobes, clearly separate apically, with the upper lobe expanded and “cap-like”
          6 Calyx with 2 entire lobes joined at the margins, rounded apically, with a distinct protuberance on the upper surface
        5 Calyx without an enlarged protuberance or “cap-like” upper lobe.
             7 Upper lip of corolla greatly reduced or lobes laterally disposed, thus the corolla appearing to consist of one large lower lip; [subfamily Ajugoideae].
               8 Lower lip with 2-4 lobes; flowers yellow or deep blue-purple; plants stoloniferous
               8 Lower lip appearing 5-lobed (proximal 2 lateral, erect lobes represent the cryptic upper lip); flowers white to pink; plants cespitose
             7 Upper lip of corolla conspicuous, flaring or galeate.
                 9 Plants distinctly repent and rooting at the nodes, or producing elongate stolons.
(c) Sorrie, Bruce A. - CC-BY
                   10 Plants stoloniferous.
                              15 Calyx with 3-4 prominent lobes (rarely 5, if one includes small teeth).
                                  17 Calyx with 4 unequal primary lobes; flowers large, 2.5-3.5 cm long, in bracteate terminal racemes
                                  17 Calyx with 3 primary lobes (upper lobe occasionally with 3 apiculate teeth, e.g. Salvia lyrata); flowers 3 cm or less, in terminal thyrses.
                              15 Calyx usually with 5 prominent lobes (except for Clinopodium with rarely fused upper lobes).
                                                                       34 Stems often with swollen nodes (areas just below appear dark and sunken upon drying, except G. ladanum); hairs of the stem either exclusively hispid or short recurved and mixed with longer glandular trichomes; corolla 15-28 mm long