Hemilophia rockii O. E. Schulz

Stems originate from rhizomes and sometimes terminate in a basal rosette, producing few or a cluster of many branches 4-10(-25) cm, puberulent throughout with crisped, simple and forked trichomes rarely to 0.2 mm. Basal leaves lanceolate to elliptic-lanceolate, 2-5 × 0.5-1.5 mm, densely covered with straight trichomes to 1 mm. Cauline leaves with petioles 1-2(-3) mm; blade oblanceolate, narrowly elliptic, or rarely ovate, (2-)4-8(-10) × (1-)2-3.5(-5) mm, sparsely covered with crisped simple trichomes to 0.5 mm, rarely glabrous, margin entire, apex subacute to obtuse. Racemes elongated considerably in fruit. Fruiting pedicels straight to slightly curved, divaricate, (3-)4-8(-10) mm, pubescent with crisped trichomes. Sepals oblong or ovate, greenish, tardily caducous, not saccate, 1.5-2 × 1-1.5 mm, with crisped simple trichomes to 0.4 mm, margin ciliate with trichomes to 0.1 mm, membranous part 0.1-0.2 mm wide. Petals yellowish to creamy white, caducous, obcordate, 5-7 × 3-5 mm, base cuneate to a claw ca. 1 mm, apex deeply emarginate or nearly 2-lobed. Filaments white, lateral pair 1.4-1.5(-1.8) mm; median pairs 1.6-1.8(-2.1) mm, inflated basal appendage 0.6-1.1 mm; anthers yellow, 0.3-0.4 mm. Fruit valves papery, 3-4 × 1.5-2.5 mm, with a crest of tubercles surrounding margin and extending along midvein; gynophore obsolete or to 0.2 mm; style stout, cylindric, minutely papillate throughout, 0.8-1.2 mm. Seeds 2-3 × 1-2 mm. Fl. Jun-Jul, fr. Jul-Aug.

SW Sichuan, E Yunnan.

* Loose limestone gravel, scree; 3900-4900 m.

Hemilophia pulchella Franchet var. flavida Handel-Mazzetti; H. pulchella var. rockii (O. E. Schulz) W. T. Wang; H. rockii var. flavida (Handel-Mazzetti) Handel-Mazzetti.

Hemilophia rockii là một loài thực vật có hoa trong họ Cải. Loài này được O.E. Schulz mô tả khoa học đầu tiên năm 1926.

小叶半脊荠（学名：Hemilophia rockii）为十字花科半脊荠属下的一个种。