The Taittiriya Shakha is a notable shakha ("rescension") of the Krishna Yajurveda. The Vishnu Purana attributes it to a pupil of Yaska named Tittiri. It is most prevalent in south India. The shakha consists of:
The Taittiriya Samhita— (TS) which consists of 8 books or kaandas, subdivided in chapters or prapathakas, further subdivided into individual hymns. Some individual hymns in this Samhita have gained particular importance in Hinduism; e.g. TS 4.5 and TS 4.7 constitute the Shri Rudram Chamakam, while 1.8.6.i is the Shaivaite Tryambakam mantra.
The Taittiriya Brahmana (having three kaandas). Part of kathaka shakha brahmana is also included in this shakha.
the Taittiriya Aranyaka (having seven prashnas)
The Taittiriya Upanishad (having three prashnas or vallis - Sheeksha valli, Ananda valli and Bhrigu valli)
The Mahanarayana Upanishad
The Nakṣatra Sūktam comes from kāṇḍa 3, prapāṭhakaḥ 5, Anuvākaḥ 1 of the Taittirīya Saṃhitāḥ
The Apastamba Shrautasutra/The Bodhayana Shrautasutra/The Vaikhanasa Shrautasutra/The Hiranyakeshi Shrautasutra