Stre - Tara
- Streblotrichum convolutum (Hedw.) P. Beauv.
- Streblotrichum convolutum (Hedw.) P. Beauv.
- Streblus anthropophagorum (Seem.) Corner
- Streblus anthropophagorum (Seem.) Corner
- Streblus Lour.
- Streblus pendulinus (Endl.) F. Muell.
- Streblus pendulinus (Endl.) F. Muell.
- Streblus sandwicensis (O. Deg.) H. St. John
- Streblus sandwicensis (O. Deg.) H. St. John
- Strelitzia Aiton
- Strelitzia nicolai Regel & Körn.
- Strelitzia reginae Aiton
- Streptanthella longirostris (S. Watson) Rydb.
- Streptanthella longirostris (S. Watson) Rydb.
- Streptanthella longirostris (S. Watson) Rydb. var. derelicta J.T. Howell
- Streptanthella longirostris (S. Watson) Rydb. var. derelicta J.T. Howell
- Streptanthella Rydb.
- Streptanthus albidus Greene
- Streptanthus albidus Greene ssp. albidus
- Streptanthus albidus Greene ssp. peramoenus (Greene) Kruckeb.
- Streptanthus albidus Greene ssp. peramoenus (Greene) Kruckeb.
- Streptanthus amplexicaulis (S. Watson) Jeps.
- Streptanthus amplexicaulis (S. Watson) Jeps.
- Streptanthus amplexicaulis (S. Watson) Jeps. var. barbarae J.T. Howell
- Streptanthus amplexicaulis (S. Watson) Jeps. var. barbarae J.T. Howell
- Streptanthus arcuatus Nutt.
- Streptanthus arizonicus S. Watson
- Streptanthus arizonicus S. Watson var. luteus Kearney & Peebles
- Streptanthus barbatus S. Watson
- Streptanthus barbiger Greene
- Streptanthus batrachopus J.L. Morrison
- Streptanthus bernardinus (Greene) Parish
- Streptanthus bernardinus (Greene) Parish
- Streptanthus brachiatus F.W. Hoffm.
- Streptanthus brachiatus F.W. Hoffm. ssp. brachiatus
- Streptanthus brachiatus F.W. Hoffm. ssp. hoffmanii Dolan & LaPre
- Streptanthus bracteatus A. Gray
- Streptanthus brazoensis Buckley
- Streptanthus breweri A. Gray
- Streptanthus breweri A. Gray var. breweri
