Notothlaspi rosulatum Hook.f.

Biennial herb, usually with a short, stout caudex 1.3–20.0 mm diam., with a single, compact leafy rosette 30–160 mm across. Leaves 9.0–80.0 mm long, radical, rosulate, densely imbricate; lamina 2.5–64.0 mm long, 2.0–16.0 mm wide, obovate-spathulate, obovate, spathulate or elliptic-ovate, purplish-brown, brown-green or green, coriaceous, adaxial surface with caducous hairs, abaxial surface glabrous; margin crenate to dentate-serrate; apex subacute to obtuse; base attenuate to obtuse; petiole 3.5–20.0 mm long, sometimes with caducous hairs. Inflorescence terminal, stout, usually simple, sometimes branched, racemose, flowers 8 to numerous; peduncle elongating up to 250 mm tall in fruit, base 2.8–15.0 mm diam., ascending, glabrous. Cauline leaves on lower part of scape, 10–17 mm long, 2.0–3.5 mm wide, obovate-spathulate, obovate or linear-lanceolate, margin crenate, undulate or with 1–2 serrate teeth. Pedicels 3.5–12.0 mm long, 0.8–2.0 mm wide. Sepals 5.0–7.8 mm long, 1.5–2.6 mm wide, lanceolate to lanceolate-ovate, green, glabrous to sparsely hairy, hairs sometimes caducous, margin entire, apex subacute, base truncate. Petals 7.3–12.0 mm long, 2.0–4.5 mm wide, white and often flushed purple, limb obovate to broadly elliptic, patent to reflexed; apex obtuse; base cuneate, tapering to a 4.0–7.5 mm long claw. Stamens 6; filaments linear, two 3.6–6.8 mm long, four 5.8–8.5 mm long; anthers 0.6–1.3 mm long, violet. Ovary 2.5–3.8 mm long, 2.2–3.0 mm wide, compressed, green, glabrous; ovules 20–100 per locule; style 0.3–1.1 mm long, terete; stigma capitate, 0.5–1.1 mm diam. Silicle 7.0–35.0 mm long, 8.5–18.5 mm wide, green, brown or brown-green, glabrous, obcordate, broadlyobcordate or obovate-obcordate, angustiseptate; valves keeled, winged, wing c. 0.5 wide at base, up to 5.2 mm wide at apex, wing extended to form an apical notch to silicle; style persistent, up to 1.2 mm long. Seeds 0.8–1.25 mm long, 0.6–1.0 mm wide, orbicular-oblong, brown.

© Magnolia Press.  Reproduced from Heenan 2019  (Phytotaxa 399 (3): pages 254–255) with permission from Magnolia Press.

It occurs on mobile screes of fine greywacke stones at an elevation of 615 to 1930 m (Heenan 2019).

FL Nov–Jan; FT Dec–Apr.

© Magnolia Press.  Reproduced from Heenan 2019  (Phytotaxa 399 (3): page 255) with permission from Magnolia Press.

Chromosome number n = 19, 2n = 36–38.

© Magnolia Press.  Reproduced from Heenan 2019  (Phytotaxa 399 (3): page 255) with permission from Magnolia Press.