Declension table of ?vṛkṣatraya

Neuter	Singular	Dual	Plural
Nominative	vṛkṣatrayam	vṛkṣatraye	vṛkṣatrayāṇi
Vocative	vṛkṣatraya	vṛkṣatraye	vṛkṣatrayāṇi
Accusative	vṛkṣatrayam	vṛkṣatraye	vṛkṣatrayāṇi
Instrumental	vṛkṣatrayeṇa	vṛkṣatrayābhyām	vṛkṣatrayaiḥ
Dative	vṛkṣatrayāya	vṛkṣatrayābhyām	vṛkṣatrayebhyaḥ
Ablative	vṛkṣatrayāt	vṛkṣatrayābhyām	vṛkṣatrayebhyaḥ
Genitive	vṛkṣatrayasya	vṛkṣatrayayoḥ	vṛkṣatrayāṇām
Locative	vṛkṣatraye	vṛkṣatrayayoḥ	vṛkṣatrayeṣu

Compound vṛkṣatraya -

Adverb -vṛkṣatrayam -vṛkṣatrayāt