Commemorating Prof. F. E. Lloyd, a collector of cacti (Cactaceae). A genus of 8 species of greenhouse succulent plants, which make small groups and are dwarf growing. Their ribs are arranged in spirals with spiny tubercles. The spines are attractive and theshowy.
N. beguinii, plant often solitary when young, many ribbed and spiny flowers pinkish-violet, Mexico. N. ceratites, oval, greyish-green stem, many greyish-white spines, flowers purple. Mexico. N. conoidea, plant has been included in Echinocactus, Mammillaria and Coryphantha at various times; handsome plant with violet to red flowers Texas. N. grandiflora, cylindrical stem with short wartlike tubercles, often woolly, flowers large, deep violet-pink, Tamaulipas, Mexico. N. texensis, considered to be a form of N. conoidea, N. Texas.
As for most cacti a porous is essential. A suitable medium is an average potting compost, with 1 part added of coarse sand and broken brick. Repot every two or three years in medium-sized pots. Keep the plants in a sunny place in greenhouse. Water from March to September, as often as the soil dries out. Rest the plants during winter, keeping the soil dry. The usual greenhouse temperatures are adequate in summer, in winter maintain a minimum temperature of 40°F (4°C). Propagation is by seed sown on a good seed compost. Do not cover the seed but just press it in to the compost. Keep the pans in a temperature of 70°F (21°C), and shade them from sun. February or March are the best . Prick the seedlings out after six months; rather slow growing. Plants may also be propagated by cuttings taken from divided plants or sideshoots.