Digitalis canariensis cm large flowers with short petals and noticeable upper lip and lower lip. Bird pollination was documented (island populations of "Phylloscopus"-species). The fruit is a capsule. "Digitalis canariensis" contains cardenolids (cardiac glycosids), which are toxic in the case of an overdose. Medical use is documented (primarily historic). For reasons of species conservation it is to refrain to influence wild stocks. "Digitalis canariensis" is endemic to the Canary Islands. It grows in woody areas (laurel forest, "Erica arborea"-covered woods) of Tenerife, La Gomera and La Palma. Digitalis canariensis Digitalis canariensis is a member of the genus "Digitalis". It is commonly called
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