Elymus trachycaulus vs. E. trachycaulis

[Adolf Ceska]

Two questions:

1) Is "Elymus trachycaulus" grammatically correct or should it be replaced
with "Elymus trachycaulis?" Cf. Silene acaulis, Papaver nudicaule, Pinus
albicaulis, etc.

2) Can the name "Elymus trachycaulus" be considered an orthographical
error and corrected to "E. trachycaulis" according to Art. 60?

Thanks.

Adolf Ceska

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