Buddleja davidii

Franchet

Nouv. Arch. Mus. Hist. Nat., sér. 2, 10: 65. 1887–1888

Common names: Summer-lilac
WeedyIntroduced
Treatment appears in FNA Volume 17. Treatment on page 328. Mentioned on page 327, 329.

Shrubs, 5–30 dm. Stems branched, tomentose. Leaves often with auriculate stipules; petiole 5 mm; blade ovate to ovate-lanceolate, 10–15 × 2–4 cm, base attenuate or cuneate, margins serrate or subentire, apex acute or acuminate, abaxial surface tomentose, adaxial glabrous or glabrescent. Inflorescences terminal, tapered-spicate or narrowly paniculate thyrses, 10–20 × 2–4 cm, cymes almost encircling inflorescence axis, 10–25 pairs, 3–30-flowered. Pedicels essentially absent; bracteoles present. Flowers fragrant; calyx sparsely hairy externally, tube 1.5–2 mm, lobes 0.5–1.5 mm; corolla straight, violet or pink, rarely white, often with yellow-orange eye, salverform, tube 8–10 mm, lobes suborbiculate, 2–3 × 2–3 mm; stamens inserted medially in corolla tube, included in tube; ovary ovoid, 2 mm, glabrous or puberulent; stigma clavate, 1 mm. Fruits capsules, brown, narrowly ellipsoid, 5–9 × 1.5–2 mm, glabrous or puberulent, dehiscence primarily septicidal. Seeds threadlike, 3–4 × 0.5 mm, wings long. 2n = 76.


Phenology: Flowering May–Oct; fruiting Jul–Nov.
Habitat: Roadsides, railroad embankments, quarries, streambeds, landslide scars, sandy lakeshores, disturbed sites.
Elevation: 0–1300 m.

Distribution

Introduced; B.C., Ont., Ala., Calif., Conn., Del., D.C., Ga., Ill., Ky., Md., Mass., Mich., Mo., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.C., Tenn., Va., Wash., W.Va., Asia (China), introduced also in Central America, South America, Europe, Africa, Pacific Islands (Hawaii, New Caledonia, New Zealand), Australia.

Discussion

Buddleja davidii has been designated as a noxious weed in Oregon and Washington; it is a serious invader also in England, New Zealand, and Australia. It can often form dense thickets and produce abundant seeds (N. G. Tallent-Halsell and M. S. Watt 2009).

Lower Taxa

None.

... more about "Buddleja davidii"
Eliane Meyer Norman +
Franchet +
Summer-lilac +
B.C. +, Ont. +, Ala. +, Calif. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ky. +, Md. +, Mass. +, Mich. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.C. +, Tenn. +, Va. +, Wash. +, W.Va. +, Asia (China) +, introduced also in Central America +, South America +, Europe +, Africa +, Pacific Islands (Hawaii +, New Caledonia +, New Zealand) +  and Australia. +
0–1300 m. +
Roadsides, railroad embankments, quarries, streambeds, landslide scars, sandy lakeshores, disturbed sites. +
Flowering May–Oct +  and fruiting Jul–Nov. +
Nouv. Arch. Mus. Hist. Nat., sér. +
tallent-halsell2009a +
Weedy +  and Introduced +
Chilianthus +  and Nicodemia +
Buddleja davidii +
Buddleja +
species +