Rubus trivialis |
Rubus parvifolius |
|
---|---|---|
southern dewberry |
Australian raspberry or bramble, Japanese bramble, Japanese raspberry |
|
Habit | Shrubs, to 3(–7) dm, sometimes climbing higher through other vegetation, moderately to densely armed. | Shrubs, 1–3 dm, armed. |
Stems | biennial, initially low-arching, then falling and creeping (or climbing through other vegetation), glabrous or moderately hairy, sparsely to densely short- to long-stipitate-glandular, not pruinose; prickles moderate to dense, recurved, sometimes distally slender, 1–4 mm, broad-based; bristles absent or sparse to dense, erect to retrorse, red to purple, rarely green, slender, weak, gland-tipped. |
biennial, low-mounding to creeping, sparsely to moderately hairy, glabrescent, eglandular, not pruinose; prickles sparse to moderate, slightly to strongly hooked, weak to stout, 0.8–1.5(–2) mm, broad-based. |
Leaves | persistent or semipersistent, ternate to palmately compound, lustrous; stipules filiform, linear, or lanceolate, 2–12(–15) mm; leaflets 3–5, terminal narrowly elliptic or ovate to obovate, 2–8.5 × 0.7–4.5 cm, base rounded to cuneate, unlobed, margins moderately to coarsely serrate to doubly serrate, apex acute to acuminate, abaxial surfaces with hooked prickles on midvein, glabrous or sparsely to moderately hairy, eglandular or sparsely short-stipitate-glandular along central vein. |
deciduous, ternate or pinnately compound; stipules filiform to linear, (4–)6–11 mm; leaflets 3(–5), terminal broadly ovate-rhombic to obovate, (2–)3–5(–9) × 2.2–5(–7.5) cm, base cuneate to obtuse, slightly 3-lobed, margins coarsely serrate to doubly serrate, apex acute to obtuse, abaxial surfaces with slightly to strongly hooked prickles on veins, densely whitish-tomentose, eglandular or sparsely short-stipitate-glandular. |
Inflorescences | terminal on short shoots, usually appearing axillary, 1(–3)-flowered. |
terminal and axillary, 2–20-flowered, cymiform to thyrsiform. |
Pedicels | prickles and, often, bristles moderate to dense, recurved, moderately to densely hairy, sparsely to moderately sessile- to short-stipitate-glandular. |
prickles moderate, slightly to strongly hooked, moderately hairy, eglandular or sparsely short-stipitate-glandular. |
Flowers | bisexual; petals white to pink, elliptic to obovate, 10–16(–25) mm; filaments filiform; ovaries glabrous. |
bisexual; petals pinkish to magenta, oblanceolate to obovate, 4–7 mm; filaments filiform; ovaries moderately to densely hairy, styles glabrous. |
Fruits | black, globose to ovoid, 1–1.5(–2) cm; drupelets 10–50, strongly coherent, separating with torus attached. |
red, round, 0.6–0.9 cm; drupelets 10–50, strongly coherent, separating from torus. |
2n | = 14. |
= 14. |
Rubus trivialis |
Rubus parvifolius |
|
Phenology | Flowering Jan–Jun. | Flowering May–Jun. |
Habitat | Open woodlands, savannas, prairies, meadows, sand dunes, disturbed areas, dry to seasonally wet soil | Disturbed sites |
Elevation | 0–200 m (0–700 ft) | 0–400 m (0–1300 ft) |
Distribution |
AL; AR; FL; GA; IL; KS; KY; LA; MO; MS; NC; OK; SC; TN; TX; VA; Mexico (Coahuila, Nuevo León, Tamaulipas)
|
DE; IA; IL; MA; MO; NE; NJ; OH; VA; e Asia; Australia [Introduced in North America] |
Discussion | Rubus trivialis is distinguished from other species of Rubus by its frequently glandular-bristly and generally creeping stems, abundant recurved prickles, and typically persistent or semipersistent, lustrous primocane leaves with relatively narrow leaflets. Although emerging primocanes typically reach to 30 cm above the ground, vigorous plants can have new primocanes standing erect to 70 cm that later fall to the ground or onto adjacent vegetation as they continue to enlarge. L. H. Bailey (1941–1945) believed that there was no clear separation between members of sect. Persistentes Fernald (referred to by Bailey as sect. Verotriviales [illegitimate sectional name for R. trivialis and associated species]) and sect. Procumbentes (by Bailey as sect. Flagellares; including R. flagellaris and related species). All characteristics that he recognized for distinguishing sect. Persistentes from sect. Procumbentes are often present in the latter, with the exception of hispid-setose stems, and glabrous plants of R. trivialis are difficult to distinguish from some plants of R. flagellaris; to include the latter species within the former would be reasonable. Rubus ×inferior L. H. Bailey is a putative hybrid of R. trivialis and R. cuneifolius. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Rubus parvifolius is distinguished from other raspberries by its broadly ovate-rhombic to obovate leaflets and relatively small flowers with pinkish to magenta petals. This species has the potential to become a very significant weed (P. M. Drobney and M. P. Widrlechner 2012). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 54. | FNA vol. 9, p. 48. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus | Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus |
Sibling taxa | ||
Synonyms | R. agilis, R. continentalis, R. duplaris, R. ictus, R. lucidus, R. macvaughii, R. mirus, R. nessianus, R. riograndis, R. rubrisetus, R. sons, R. tallahasseanus | R. triphyllus |
Name authority | Michaux: Fl. Bor.-Amer. 1: 296. (1803) | Linnaeus: Sp. Pl. 2: 1197. (1753) |
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