Treesinger Wild Shape?

[Samandriel Autumnvale]

I'm going to be playing a level 6 Treesinger soon, but I have a question about his wildshape abilities. How much of the plant do I imitate? I figure I take over its base stats and attacks, but what about special abilities? The Plant Shape spell specifically says If the form you assume has any of the following abilities, you gain the listed ability: darkvision 60 feet, low-light vision, constrict, grab, and poison.
So I don't gain any other abilities that plant might have (and the constrict and poison at level 8, per my class ability)? Walk me through it, I'm confused. Say I transform into a Mandragora. I get Str 15, Dex 18, Con 17, Int 8, Wis 13, Cha 10. Does my HP change? Do I get the plant traits, elemental resistances and so on? I'm pretty sure I get the attacks of the Mandragora, but I don't get the special abilities (blood drain, shriek), as they're not part of what's listed in the Plant Shape spell.
TL;DR: Terribly confused about how much I change when I wildshape and what abilities I have access to.

[LazarX]

Here's how the wildhsape abilities work.

1. You use the Beast Shape spells as appropriate for your level of druid.

2. The spells work on your own attributes, (this is the BIG change from 3.5) you do not get the bestiary stats of whatever critter you're becoming. What you get are modifiers to your existing stats.

3. The spells specific what abilites you can get, the only abilities you get are those described in the spell. They must however be abilities availble to the critter as well so essentially you are limited to where the spell provided package and those from the critter overlap.

4. The Treesinger archetype places it's own options and limitations that affect the package but the overall structure remains the same.

[Samandriel Autumnvale]

Thanks for the quick reply! So, in the case of the Mandragora, I'd get a +2 CON and +2 natural armor, and that's it? I presume I still get the movement (in this case, a burrow and climb speed) and attacks of whatever creature I'm shaping into, right (so, the bite plus grab and/or two slams with reach)? If that's the case, I might want to rethink my build, as I was sort of thinking about an archery-focused build, but most of these plants want to be up close and personal.