Solanum juzepczukii Bukasov

OVCHINNIKOVA, ANNA, KRYLOVA, EKATERINA, GAVRILENKO, TATJANA, SMEKALOVA, TAMARA, ZHUK, MIKHAIL, KNAPP, SANDRA & SPOONER, DAVID M., 2011, Taxonomy of cultivated potatoes (Solanum section Petota: Solanaceae), Botanical Journal of the Linnean Society 165 (2), pp. 107-155 : 119

3. Solanum juzepczukii Bukasov ,

Trudy Vsesoyuzn. S”ezda Gen. Selekts. Semenov. Plemen. Zhivotnov. 3: 603. 1929.

Type: cultivated in Leningrad from tuber accession 3355 collected in Peru (Cusco: prov. Acomayo, Pomacanchi, S. Juzepczuk 1166), 1.ix.1928, V.S. Lekhnovich [3355] (lectotype WIR! [ WIR-36897 ], designated here; isolectotype, K! [ K 000585544 ]). Figure 3 .

Solanum juzepczukii Bukasov var. parco Hawkes,

Potato Collect. Exped. Mexico & S. Amer., 2, Syst. Classific. Collect. 73, 131. 1944.

Type: cultivated in Cambridge ( UK) from tuber accession EPC-1106 collected in Peru (Puno, J. Soukup s.n.), 1940, Anon. [ J. G. Hawkes ] s.n. (lectotype, K! [ K 000658001 ], designated here) .

Solanum juzepczukii Bukasov var. roseum Vargas , Papas Sudper. 2: 20, fig. 2. 1956 [‘1954’].

Type: Peru. Puno: Prov. Carabaya, Macusani , 4300 m, C. Vargas 1145 (holotype, CUZ!).

Solanum juzepczukii Bukasov forma ckoyuckaisalla Ochoa,

Phytologia 65: 106. 1988.

Type: Bolivia. Oruro: Prov. Carangas, Jango Cala, Z. Huamán 821 (holotype, herb. Ochoa, not found).

Solanum juzepczukii Bukasov forma janckock-aisalla Ochoa ,

Phytologia 65: 107. 1988.

Type: Bolivia. Oruro: Prov. Poopó, Toledo , 3700 m, Z. Huamán 809 (holotype, CUZ! [original citation as herb. Ochoa ]) .

Solanum juzepczukii Bukasov forma luckipechuma Ochoa, Phytologia 65: 107. 1988.

Type: Bolivia. Oruro: Challa, CIP-702631 (holotype, CIP!).

Solanum juzepczukii Bukasov forma luckipinkula Ochoa, Phytologia 65: 107. 1988.

Type: Bolivia. Potosí: Prov. Frias, Callactiri , 3900 m, C. Ochoa 10571 (holotype, CUZ! [original citation as herb. Ochoa ]).

Solanum juzepczukii Bukasov forma wilackaisalla Ochoa, Phytologia 65: 107. 1988.

Type: Bolivia. Oruro: Prov. Poopó, Saucari-Toledo , Z. Huamán 815 (holotype, herb. Ochoa , not found).

Solanum juzepczukii Bukasov var. lucki Ochoa,

Phytologia 65: 107. 1988.

Type: Bolivia. La Paz: Prov. Ingavi, Ingavi , Z. Huamán 789 (holotype, CUZ! [original citation as herb. Ochoa ]) .

Description: Herbs 0.4–0.8 m tall, semi-rosette when young, developing to semi-erect. Stems 10–15 mm in diameter at base of plant, unwinged to narrowly winged, sparsely pubescent, green to green splotched with purple. Sympodial units tri- to plurifoliate, not geminate. Leaves odd-pinnate, the blades 14–28 x 6– 10 cm, dark green, membranous to chartaceous, rugose, sparsely pubescent adaxially and abaxially, with hairs like those of the stems; lateral leaβet pairs five to seven, decreasing in size from the apex to the base; most distal lateral leaβets 2.5–6.5 x 1.0– 3.5 cm, slightly decurrent onto the rachis on the basiscopic side, broadly ovate to broadly elliptic, the apex obtuse to acute, the base cuneate or rounded; terminal leaβet 3–7 x 2–4 cm, broadly ovate to broadly elliptic, the apex obtuse to acute, the base cuneate or rounded; interjected leaβets one to four, sessile to short petiolulate, broadly ovate to broadly elliptic; petioles 2–4 cm, pubescent as the stems. Pseudostipules 1–5 mm, auriculate, pubescent with hairs like those of the stem. Inβorescences 5–6 cm, terminal with a subtending axillary bud, generally in distal half of the plant, usually forked, with 10–15 βowers, with all βowers apparently perfect, the axes pubescent with hairs like those of the stem; peduncle 7–16 cm long; pedicels 22–35 mm long in βower and fruit, 1–10 mm apart, articulation indistinct or only slightly distinct, articulated high in the distal half. Flowers homostylous, pentamerous. Calyx 4–10 mm long, the tube 1–2 mm, the lobes 2–9 mm, triangular-lanceolate or ellipticlanceolate, terminated in pointed acumens, the acumens 2.0– 4.5 mm long, with hairs like those of the stem. Corolla 3–4 cm in diameter, rotate, lilac–purple or dark red–purple or medium to dark purple, the tube 1–2 mm long, the acumens c. 2 mm long, the corolla edges βat, not folded dorsally, glabrous abaxially, minutely puberulent adaxially, especially along the midribs, ciliate at the margins, especially at the tips of the corollas. Stamens with the filaments 1–2 mm long; anthers 3–5 mm long, lanceolate, connivent, yellow, poricidal at the tips, the pores lengthening to slits with age. Ovary glabrous; style 6–8 x 1 mm, exceeding stamens by 1–2 mm, straight, papillose in the distal half; stigma capitate. Fruit a globose to ovoid berry, 0.5–1.0 cm in diameter, green to green tinged with purple when ripe, glabrous. Seeds from living specimens ovoid and c. 2 mm long, whitish to greenish in fresh condition and drying brownish, with a thick covering of ‘hair-like’ lateral walls of the testal cells that make the seeds mucilaginous when wet, green–white throughout; testal cells honeycomb-shaped when lateral walls removed by enzyme digestion. Chromosome number: 2 n = 3 x = 36 (Huamán 815, Herbarium of the International Potato Center, Lima, Peru).

Phenology: Flowering and fruiting from January to May.

Distribution: In the high Andean altiplano between southern Peru and central Bolivia, in cultivated fields, at elevations between 3600 and 4400 m.

The name S. juzepczukii was validly published in 1929 with a complete Latin description and a single accession cited as the type ( Juzepczuk & Bukasov, 1929, see discussion under S. curtilobum above), but is often cited as having been coined later (in Bukasov, 1930) in indices.

Figures

Figure 3. Lectotype specimen of Solanum juzepczukii Bukasov held in WIR (WIR-36897). Reproduced with permission of the N. I. Vavilov Institute of Plant Industry.