Digitalis thapsi Digitalis thapsi Digitalis thapsi, known commonly as Spanish foxglove, Spanish digitalis, and fingerhut foxglove, is a flowering plant in the genus "Digitalis" that is native to Spain. It was first described by Carl Linnaeus in 1753. It is of commercial importance as an ornamental plant. Hybrids with "D. purpurea" have proved successful and are fertile. Its yellow-green leaves are ovate to oblong in shape and decurrent, with winged bases. The flowers, stems and leaves are covered with tiny hairs, giving them a soft appearance. The leaves have non-glandular trichomes and a striated cuticle. The pink flowers are arranged in raceme
Derive (computer algebra system) Derive (computer algebra system) Derive was a computer algebra system, developed as a successor to muMATH by the Soft Warehouse in Honolulu, Hawaii, now owned by Texas Instruments. Derive was implemented in , also by Soft Warehouse. The first release was in 1988 for DOS. It was discontinued on June 29, 2007 in favor of the TI-Nspire CAS. The last and final version is Derive 6.1 for Windows. Since Derive required comparably little memory, it was suitable for use on older and smaller machines. It was available for the DOS and Windows platforms and was used also in TI pocket