vintageluvs's list "Eccentric Botanical Names for Girls" of 8 great name ideas: Salpiglossis - Zinnea!

Eccentric Botanical Names for Girls

The non-traditional flower names, so no Rose and no Lily. This list includes some arboreal names. These are flower names ramped up and on edge almost to the point of not usable.

Salpiglossis

Another name for the herb sage -- which sounds younger and more modern than this version. 

Salvia

Snapdragon

Sunflower

Sweetpea

Viola has plenty of positive elements going for it: the rhythm of the musical instrument, the association with the flower, the trending 'Vi' beginning and its leading role in Shakespeare's Twelfth Night. With a touch of international flair, it also avoids the violent/Violet some parents have. 
 In the Bard's gender-bending comedy of identity and disguise, Viola is the appealing, passionate heroine, while later takes on this tale include Shakespeare in Love, with Gwyneth Paltrow as Viola de Lesseps and She's the Man starring Amanda Bynes. The most distinguished current real-life bearer is Oscar- and Emmy-winning actress Viola Davis.
 Viola was a Top 50 name in the US from 1899 to 1911, falling off the list in 1972, but is still popular in other countries such as Italy, where it's in the Top 30 and Finland where it's in the Top 20. More recently, it has entered the England and Wales Top 1000, joining other Shakespearean favorites like Ophelia and Imogen.
 
And in the US too, where Violet is now a mega-star, strong Viola is climbing up the ranks again, with more than 230 girls given the name in a recent year. 
 
The name does have a number of different pronunciations depending on preference and location. English speakers might say it with the long -i- sound in Violet, making it vye-O-luh or VYE-uh-luh, though vee-O-luh is used too. Elsewhere, it may be heard as VYAW-la (Italy), vih-OO-la (Sweden), vee-O-la (Spanish, German), VEE-aw-la (Slovak), and VEE-o-law (Hungarian). Occasionally, it might even be said with two syllables, VYE-luh, missing out the o sound, as you might in Violet.

Viola

Yarrow is a flowering herb that grows wild in Europe and North America, and has long been used in several Native American and European cultures as a healing plant. Named for the mythical god Achille, Yarrow is a symbol of enduring love.

As a baby name, Yarrow is highly unusual, given to no babies in the US in the most recent year counted.