Buddleja sessiliflora

Kunth in A. von Humboldt et al.

Nov. Gen. Sp. 2(fol.): 278; 2(qto.): 345; plate 182. 1818.

Common names: Rio Grande butterfly bush
Synonyms: Buddleja pringlei A. Gray
Treatment appears in FNA Volume 17. Treatment on page 331. Mentioned on page 328.

Shrubs or trees, 15–40 dm. Stems much-branched, tomentose when young. Leaves: basal: stipular lines evident; petiole 10–40 mm; blade ovate, 9–23 × 5–14 cm, base attenuate to obtuse, decurrent, margins serrate or double-serrate, apex acute or acuminate, abaxial surface tomentulose, adaxial glabrate; cauline: stipular lines evident; petiole 0–10 mm; blade lanceolate or narrowly elliptic, 5–15 × 1.5–3 cm, base attenuate, decurrent, margins entire or irregularly serrate, apex acute, abaxial surface tomentulose, adaxial glabrate. Inflorescences terminal, pseudoverticillate spikes, 6–25 × 1–3 cm, cymes 5–20 pairs, 10–35-flowered. Pedicels absent; bracteoles absent. Flowers malodorous; calyx tomentose externally, tube 1.7–3 mm, lobes 1–1.8 mm; corolla yellow, funnelform, tube 3.2–4.2 mm, lobes ovate, 1–1.5 × 1.2–1.7 mm; stamens inserted 1 mm proximal to orifice of corolla-tube, included in tube; ovary ovoid, 1–1.5 mm, distal 1/2 tomentose; stigma clavate, 1.2–1.4 mm. Fruits capsules, brown, cylindric, 4–4.5 × 1.7–2 mm, tomentose at apex, dehiscence septicidal and loculicidal. Seeds fusiform, 0.8–1.2 × 0.3–0.4 mm, wings short. 2n = 76.


Phenology: Flowering Jan–Apr; fruiting Mar–Jun.
Habitat: Tamaulipan thorn scrub, riparian woodlands, roadsides.
Elevation: 10–1400 m.

Discussion

Buddleja sessiliflora is found in association with Dodonaea viscosa, Fouquieria splendens, and Parkinsonia aculeata in Arizona and with Celtis laevigata, Fraxinus berlandieriana, and Prosopis glandulosa in southernmost Texas. It is widespread in Mexico from Sonora and Tamaulipas to the Isthmus de Tehuantepec, except in the Chihuahuan Desert, at elevations to 2800 m.

Selected References

None.

Lower Taxa

None.
... more about "Buddleja sessiliflora"
Acute (?) +  and Acuminate (?) +
Eliane Meyer Norman +
Kunth in A. von Humboldt et al. +
decurrent +, attenuate +  and obtuse +
indehiscent +, loculicidal +, septicidal +  and dehiscence +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
elliptic;lanceolate;ovate +
? (?) +, ? (?) +  and ? (?) +
1.5cm;3cm +
campanulate +
indehiscent +, loculicidal +, septicidal +  and dehiscence +
globular +  and cylindric oblong ellipsoid or subglobular +
decussate;opposite +
Rio Grande butterfly bush +
bilabiate +, regular +  and symmetric +
10-35-flowered +
Ariz. +, Tex. +  and Mexico +
10–1400 m. +
curved +  and straight +
not +  and abundant +
yellow-orange +
malodorous +
trioecious +, dioecious +  and bisexual +
indehiscent +, loculicidal +, septicidal +  and dehiscence +
globular;cylindric oblong ellipsoid or subglobular +
loculicidal +  and septicidal +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Tamaulipan thorn scrub, riparian woodlands, roadsides. +
pseudoverticellate +
alternate +  and opposite +
deciduous +, semipersistent +  and persistent +
cauline +  and basal +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1.2mm;1.7mm +
serrate +, entire +  and double-serrate +
entire +, subentire +, sinuate-dentate +, undulate +  and crenate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
tenuinucellate +, unitegmic +  and hemitropous +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jan–Apr +  and fruiting Mar–Jun. +
Nov. Gen. Sp. +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
fusiform +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
connate +  and distinct +
pseudoverticillate +
6 cm60 mm <br />0.06 m <br /> (25 cm250 mm <br />0.25 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
proximal +  and inserted +
much-branched +
pendent +  and erect +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
as stipular lines +
Buddleja pringlei +
Buddleja sessiliflora +
Buddleja +
species +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
perennial +, biennial +  and annual +
tree +  and shrub +