Rye, B.L. (9 May 1988), A revision of Western Australian Thymelaeaceae. Nuytsia 6(2): 246-247, Fig. 63 (map) [tax. nov.]

• Type: "Jindong, S of Busselton, Western Australia, 20 Oct. 1950, R.D. Royce 3402; holo: PERTH; iso: CANB, MEL."

• Etymology: "Longus (L.) - long, tubus (L.) - pipe, referring to the long floral tube."

Rye, B.L. in George, A.S. (ed.) (1990), Thymelaeaceae. Flora of Australia 18: 204, Map 291 [secondary reference]

Rye, B.L. (17 December 1999), An updated revision of Pimelea sect. Heterolaena (Thymelaeaceae), including two new taxa. Nuytsia 13(1): 174, Fig. 3C-E APC [secondary reference]

• APC Dist.: WA

---