Description
Calathea –
There are about 300 species of evergreen rhizomatous perennials, in this genus. They occur in humid forest and at forest margins in tropical Central and South America, and the West Indies. Most are clump forming, with large ovate to elliptic, shiny, long stalked, pale to dark green leaves, often attractively patterned and purplish-red on the reverse, young plants may differ from mature plants in the size and color of their foliage. Hidden among the leaves it bears pairs of small flowers, that are rarely produced in cultivation, are tubular with extended upper and lower lips, and are carried in racemes or dense spikes, accompanied by sheathed bracts, in summer. One species is grown as food crop, yielding small starchy tubers, grow as a houseplant.
Indoors, grow in soilless or soil based potting mix in bright indirect or filtered light, with high humidity, draft free conditions, and a constant temperature. When in growth, water freely and apply a balanced liquid fertilizer monthly, water moderately in winter. Divide clumps in late spring.
Prone to spider mites, bud mites, mealybugs, aphids, fluoride toxicity, leaf necosis leaf spots, fungal leaf spots, and bacterial leaf spots.
C. lancifolia – C. insignis – Rattlesnake Plant – This clump forming perennial from Brazil grows 18″ tall and 24″ wide. It produces erect, linear to lance shaped, wavy edged leaf blades, to 18″ long, on leaf stalks to 12″ long. Leaves are pale green above, with darker green patches on either side of the midribs and deep red-purple beneath. Yellow flowers are borne in conical spike, 2-4″ long in summer.
Zones 11-15
