Buddleja forrestii Diels

Buddleja forrestii Diels X B. macrostachya Bentham has been reported from Mengzi Xian in Yunnan (Leeuwenberg, Meded. Landbouwhogeschool 79(6): 149. 1979). This hybrid has the following characteristics: Shrubs. Branchlets 4-angled or nearly so and often narrowly winged, stellate tomentose or pubescent and/or with glandular hairs, glabrescent. Petiole to 1.5 cm; leaf blade elliptic to narrowly elliptic, 10--20 X 3--7 cm, stellate tomentose, margin crenate-serrate to serrate. Inflorescences thyrsoid or paniculate cymes. Calyx campanulate, outside glabrous or stellate tomentose and with some minute glandular hairs. Corolla purple to pinkish; tube ca. 9 mm, outside glabrous or loosely stellate tomentose only on apical half; lobes suborbicular, 2--6 X 2--6 mm. Stamens inserted below corolla mouth. Ovary ovoid, 2--4 X 1.2--1.4 mm, stellate tomentose but basally glabrous. Capsules ellipsoid, 7--10 mm, stellate tomentose.

Shrubs 1--6 m tall; young branchlets, leaves, petioles, and inflorescences glabrous or stellate pubescent or tomentose and with glandular hairs but soon glabrescent. Branchlets nearly 4-angled, often narrowly winged. Petiole 2--15 mm; leaf blade ± narrowly elliptic, 5--35 X 1--8 cm, base cuneate to decurrent, margin crenate-serrate, serrate, less often dentate, or in some leaves subentire, apex acuminate, lateral veins 8--18 pairs. Inflorescences terminal and often also in or above axils of upper leaves, thyrsoid or less often paniculate, lax to almost spikelike and then interrupted or not, 6--25 X 2--8 cm. Calyx campanulate, 3.5--7 mm, outside glabrous or stellate tomentose and with some minute glandular hairs; lobes triangular, 1--2 mm. Corolla orange, pinkish, purple, or mauve, 0.9--1.6 cm; tube 7--11 X (1.2--)2--3.5 mm, inside pilose above middle; lobes suborbicular, 2--6 X 2--5.5 mm, inside glabrous or with some glandular hairs, outside glabrous or stellate tomentose and with some minute glandular hairs. Stamens inserted above or below middle of corolla tube; anthers ovate. Ovary ovoid to subovoid, 2--6 X 1--3 mm, stellate tomentose or glabrous. Capsules ellipsoid to narrowly ovoid, 6--12 X 2--4 mm, with some glandular hairs. Seeds narrowly elliptic, 2--4 mm, winged all around. Fl. Jun-Oct.

Sichuan, SE Xizang, Yunnan [Bhutan, India, N Myanmar].

Open woodlands, forest edges, or scrub, mostly near riverbanks in mountains; 1800--4000 m.

Buddleja cooperi W. W. Smith; B. forrestii var. gracilis Lingelsheim; B. henryi Rehder & E. H. Wilson; B. henryi var. glabrescens C. Marquand; B. latiflora S. Y. Pao; B. limitanea W. W. Smith; B. longifolia Gagnepain; B. pterocaulis A. B. Jackson; B. subherbacea Keenan; B. taliensis W. W. Smith.

Buddleja limitanea is a small deciduous shrub. Discovered by George Forrest in Yunnan (1912) and in northern Burma (1914), described by William Wright Smith in 1916. Resembling a small B. forrestii and hence sunk under this name by Leeuwenberg, although recognised in horticulture as a separate species.