Xerophyte

Central Spines

8.

Description

Arrojadoa dinaeSN|4856]]SN|4856]] is a low succulent shrub with slender stems, up to 30 cm tall, the stems being covered with yellowish brown spines and greyish-white wool, and even more dense towards the apex where the pseudocephalium develops bicolored, brownish red to violet-pink blooms. Plants are shrubby, basally branching with subterranean tubers.

Roots

Tuberous.

Cephalium

With white wool and brownish bristles 1.5–2 cm long.

Flowers

Tubular, often bicolored, brownish red to violet-pink, to 30 mm long and 9 mm in diameter, the pericarpel and tube naked, the limb very short, stamen and style not projecting.

Spines

Yellowish brown to white or nearly so, radiating, flexible, 4-8 mm long.

Ribs

8–11, narrow, rounded, 4-5 mm wide.

Stem

Thin, cylindrical, to 30 cm long, 1.8-2 cm in diameter.

Radial Spines

About 12, not easily differentiated.

Fruits

Berry-like, juicy, brownish red, sometimes bicolored, oval to pear shaped.

Areoles

Closely set, about 5 mm apart, round, with greyish white wool at first, laternone. Flowering areoles different from non flowering, tufted with bristles and hairs.