Mandevilla brachysiphon |
Mandevilla lanuginosa |
|
---|---|---|
Huachuca Mountain rocktrumpet, western rocktrumpet |
plateau rocktrumpet, woolly rocktrumpet |
|
Habit | Subshrubs, 2–4 dm; rhizomes present. | Shrubs, 2–5(–10) dm; rhizomes absent. |
Stems | sparsely to densely eglandular-pubescent, especially on younger growth. |
densely eglandular-pubescent, especially on younger growth. |
Leaves | opposite or subopposite, occasionally subverticillate; petiole 1–2 mm, pubescent; blade ovate-lanceolate to oblong-ovate, (8–)14–35 × (3.5–)6–15(–25) mm, subcoriaceous, base cuneate, rounded, or slightly cordate, margins not revolute, apex acute, acuminate, or rounded, apiculate, surfaces densely eglandular-pubescent abaxially, eglandular-pubescent adaxially. |
opposite, rarely subopposite; petiole 1–3 mm, pubescent; blade oblong to ovate or elliptic, 15–30(–40) × 7–16(–25) mm, subcoriaceous, base rounded or subcordate, margins revolute, apex acute, rounded, or truncate, apiculate, surfaces densely grayish white eglandular-pubescent abaxially, eglandular-pubescent adaxially. |
Peduncles | 0–1(–3) mm, pubescent. |
0.5–1.5 mm, pubescent. |
Pedicels | 7–15 mm, pubescent. |
3.5–9 mm, pubescent. |
Flowers | sepals reddish, oblong-ovate, 4–9 × 1–2.2 mm, pubescent; corolla white, often tinged with pink or red, often greenish below, eglandular-pubescent abaxially and adaxially, tube 13–20(–25) × 1.5 mm, throat (11–)15–20(–25) × 4–5 mm, lobes spreading, obliquely ovate, (10–)15–25 × 10–20 mm. |
sepals reddish, oblong-lanceolate, 8–12.5 × 1.5–3 mm, pubescent; corolla white, often tinged with pink or red, often becoming ferruginous upon drying, eglandular-pubescent abaxially and adaxially, tube 40–80(–100) × 2.5–3 mm, throat 14–25 × 5–7 mm, lobes spreading, obliquely ovate, 15–35 × 13–23 mm. |
Seeds | 5–7 × 1–1.5 mm. |
7–8 × 1.4–1.6 mm. |
Cymes | 1(or 2)-flowered. |
1(or 2)-flowered. |
Follicles | 55–120 × 4–5 mm, pubescent. |
50–100 × 3–4 mm, pubescent. |
Mandevilla brachysiphon |
Mandevilla lanuginosa |
|
Phenology | Flowering summer; fruiting summer–fall. | Flowering spring–fall; fruiting summer–fall. |
Habitat | Desert scrub, desert grasslands, pine-oak woodlands. | Grasslands and openings in thorn scrub vegetation. |
Elevation | 1000–1600 m. (3300–5200 ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Sonora)
|
TX; Mexico (Durango, Hidalgo, Nuevo León, San Luis Potosí, Tamaulipas) |
Discussion | Mandevilla brachysiphon has the westernmost distribution of our species. Within the flora area, M. brachysiphon is known only from southeastern Arizona (Cochise, Graham, Pima, and Santa Cruz counties), southwestern New Mexico (Hidalgo and Luna counties), and the Franklin Mountains of El Paso County, Texas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Mandevilla lanuginosa occurs at lower elevations than other Mandevilla species in the flora area and is characteristically found in openings in Tamaulipan thorn scrub and mesquite woodlands in southern Texas. Mandevilla lanuginosa is sometimes confused with M. macrosiphon; characters separating the two species are discussed under the latter taxon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 14. | FNA vol. 14. |
Parent taxa | Apocynaceae > Mandevilla | Apocynaceae > Mandevilla |
Sibling taxa | ||
Synonyms | Echites brachysiphon, Macrosiphonia brachysiphon, Telosiphonia brachysiphon | Echites lanuginosus, Macrosiphonia lanuginosa, Telosiphonia lanuginosa |
Name authority | (Torrey) Pichon: Bull. Mus. Natl. Hist. Nat., sér. 2, 20: 106. (1948) | (M. Martens & Galeotti) Pichon: Bull. Mus. Natl. Hist. Nat., sér. 2, 20: 106. (1948) |
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