Things are still moving along slowly in the Potomac Gorge, but with warmer weather coming I expect the show will really get going soon.
On March 25 I found large patches of harbinger-of-spring blooming near Billy Goat B.
The bluebell buds should open in the next few days. 
A few cutleaf toothwort are out, and lots of spring beauties, of course. Spicebush is also starting to bloom. 
And there were several bloodroots flowering near Old Angler’s.
See LW’s comments on the last post for an update of the area around Carderock.
Elizabeth's Wildflower Blog 
Wow, nice harbinger patch! Haven’t found any anywhere except right at Carderock; I’ll look for this. Unfortunately, most of the time when I think I’ve spotted harbinger it turns out to be bittercress.
LW, contact me elizaberry AT idrathernotsay DOT com and I’ll explain where the harbinger is.
Bluebells seem to be common there. Others share pictures of them too. I have never seen them. They are not native here.