DesertUSA posted the following report from Big Bend National Park
The first of this season’s Bluebonnets have begun to sprout along trails and roadsides. Taller than most Bluebonnets, the Big Bend Bluebonnet (Lupinus havardii) usually blooms Feb-April. To help protect these new blooms while driving safely on park roads, pull over onto paved or gravel pullouts. Watch for many more blooms to come!
See photos at Desert Wildflower Reports for Texas – DesertUSA