Where does “spikegrass” come from?

spikegrass (English) comes from English Spike, from Middle Dutch spīker, from Old Dutch spīkāri, from Proto-West Germanic spīkārī, from Latin spicarium, from Latin -ārium, from Latin -um, from Proto-Italic *-om.

spikegrass (English): Either of two tall perennial American grasses (Uniola paniculata and Uniola latifolia) with broad leaves and large flattened spikelets

Definitions

  1. Either of two tall perennial American grasses (Uniola paniculata and Uniola latifolia) with broad leaves and large flattened spikelets

Ancestry of “spikegrass”, step by step

spikegrass traces back through two separate lines of ancestry.

via English Spike

StepLanguageWordMeaning
1EnglishSpikeA sort of very large nail
2Middle Dutchspīker
3Old Dutchspīkāri
4Proto-West Germanicspīkārīgranary
5Latinspicariumgranary
6Latin-āriumused primarily to form nouns of purpose from other nouns, such as places where things are kept or objects used for a particular end
7Latin-umnominative neuter singular of -us; accusative...
8Proto-Italic*-om
9Proto-Indo-European*-oHom

via English grass

StepLanguageWordMeaning
1EnglishgrassAny plant of the family Poaceae, characterized by...
2Middle EnglishgrasA grass; Any plant; especially a herbaceous one;...
3Old Englishgræsgrass
4Proto-West Germanicgrasgrass
5Proto-Germanicgrasągrass
6Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Indo-European *-oHom