Lycopus asper
 
Western Water-Horehound

Upper Plant in Ground

Good Spirit Lake Provincial Park
09-August-2013

Note the inflorescence is a spike of verticillasters.  A verticillaster is a pair of axillary, oppositely placed cymes.

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Asper: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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plant tuber-bearing; NOT [plant without tubers]

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lower and middle leaves sessile; NOT [lower and middle leaves with petioles or narrow bases]

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lower and middle leaves serrate; NOT [lower and middle leaves incised or pinnatifid]

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calyx lobes longer than nutlets; NOT [calyx lobes not as long as nutlets]

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calyx lobes narrow and acute; NOT [calyx lobes ovate and blunt]

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nutlets with the upper outer margin truncate; NOT [nutlets with the upper outer margin well rounded]

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nutlets with upper outer margin often undulate; NOT [nutlets with the upper outer margin entire]

 

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Lycopus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
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plants of moist habitats; NOT [plants of dry habitats]

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perennial; NOT [annual]

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leaves not palmately lobed, crenate to serrate; NOT [leaves palmately 3-lobed]

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flowers in axillary clusters; NOT [flowers solitary or in axillary racemes], NOT [flowers terminal, in head-like clusters or spike-like racemes]

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flowers sessile; NOT [flowers pedicellate]

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calyx indistinctly 2-lipped or regular; NOT [calyx distinctly 2-lipped, the upper part differing from the lower part] (BF)

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calyx without hooks at tips of lobes; NOT [calyx with 10 lobes, each hooked at the tip]

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corolla 4- or 5- lobed, hardly, if at all, 2-lipped; NOT [corolla distinctly 2-lipped]

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corolla white; NOT [corolla blue or lavender]

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stamens 2 (staminodes may be present); NOT [stamens 4]

 

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Labiatae: Answers to key questions in Budd's Flora  leading to this family. 
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herbs; NOT [shrubs or trees]

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plants green or with some chlorophyll; NOT [plants parasitic or saprophytic, without chlorophyll]

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plants not aquatic

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stems square

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leaves opposite

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leaves not bearing bladders

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flowers not in heads or spikes; NOT [flowers in long or short spikes], NOT [flowers in heads or in form resembling a head]

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flowers with two floral rings

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petals wholly or partly united forming a tube or bell]

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corolla irregular; NOT [corolla regular]

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ovary superior; NOT [ovary inferior]

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fruit with 4 nutlets; NOT [fruit a many-seeded capsule]