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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Lactuca

2. Lactuca dissecta D. Don, Prodr. Fl. Nepal. 164. 1825.

裂叶莴苣 lie ye wo ju

Lactuca auriculata Candolle.

Herbs ca. 40 cm tall, annual. Stem solitary, erect, simple or divaricately branched from base; branches slender, glabrous. Leaves glabrous, base sagittately to auriculately clasping stem. Lower and middle stem leaves obovate, spatulate, or elliptic, 3-7 × 1-3.5 cm, pinnatipartite to subpinnatisect, margin entire or sparsely dentate; lateral lobes 3-6 pairs, rhombic, flabelliform, or orbicular, apex rounded to acute; terminal lobe rhombic, apex acute. Upper stem leaves lanceolate to linear-lanceolate, smaller, less or not divided, apex acuminate. Synflorescence corymbiform, with some to numerous capitula. Capitula with ca. 15 florets; peduncle capillaceous, usually longer than capitulum. Involucre narrowly cylindric and ca. 6 mm at anthesis, longish ovoid and to 1.3 × 0.3-0.4 cm in fruit. Phyllaries abaxially purplish red, glabrous, apex acute; outer phyllaries ovate to linear-lanceolate, approaching inner phyllaries to 3/4 their length; inner phyllaries ca. 5. Florets blue to bluish purple [or pale yellowish]. Achene body pale brown to blackish, obovoid, ca. 2.5 mm, compressed, with 3 ribs on either side; beak white, filiform, 4-4.5 mm. Pappus 3-4 mm. Fl. and fr. Jun. 2n = 16.

Grasslands; ca. 2000 m. Xinjiang, ?Xizang [Afghanistan, Bhutan, India (Sikkim), Kashmir, Kazakhstan, Kyrgyzstan, Nepal, Pakistan, Tajikistan; SW Asia].


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