Roella amplexicaulis Dod

Glabrous. Like P. squarrosa but larger, more erect, more rigid, and with larger flower heads. Stems woody, up to 50 cm. high, usually branched from below the flower heads only. Leaves crowded, often overlapping, rotund-ovate, 0-6-lcm. long, 0-4-0-8 cm. wide, rigid, squarrose, falcate, concave above, clasping at the base, with short smooth decurrent wings. Leaves sharply serrate on the upper part, ciliate on the lower, the tip acute or acuminate and almost pungent. Flower heads 2-4 cm. diam., with 3-8 flowers. Bracts almost orbicular, 0-7-1-3 cm. long, 0-7-0-9 cm. wide, rather regularly serrate on the upper part, ciliate on the lower, the acute tip reflexed. Calyx lobes 5-7 mm. long, scarcely longer than the bracts, 2 mm. wide, acute, ciliate, shorter than the corolla tube. Corolla white or pale blue, 1-2-2-2 cm. long, with broad subacute lobes half as long as the tube. Corolla often hairy inside. Style slightly widened below the stigma. Ovary glabrous.