Digitalis ferruginea Digitalis ferruginea Digitalis ferruginea, the rusty foxglove, is a species of flowering plant in the genus "Digitalis" of the family Plantaginaceae. It is native to Hungary, Romania, Turkey and the Caucasus. It is a biennial or short-lived perennial plant growing to , which forms a rosette of oblong dark green leaves and carries spikes of brown, tubular flowers in summer. The Latin specific epithet "ferruginea" means “rusty coloured”, referring to the flowers. As with all species of foxglove, all parts of this plant may cause severe discomfort and vomiting if eaten. Contact with the leaves may also cause an allergic
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