Penstemon digitalis "finger": the flowers resemble fingers of a glove. The plant grows in moist, sandy soil in full sun in meadows, prairies, fields, wood margins, open woods and along railroad tracks. Its bloom period is from late spring to early summer. The plant is known to attract, butterflies, and birds such as hummingbirds. It tolerates deer browsing. Native states for "P. digitalis" include Iowa, Nebraska, and Missouri although it is less common in Iowan native prairies compared to other "Penstemon" species. The genus "Penstemon" is the largest in North America with 270 species. However, genome size was relatively unknown for the
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