How do I populate a multi-select field with a single column from a model?

I want to grab a single column in a model and use it to populate a
multi-select form field. Here's the code that I'm currently using:

areas = forms.ModelMultipleChoiceField(queryset=Area.objects.all(),
label='Preferred Areas', help_text='Select the areas that you\'d like
to serve.')

This code returns the entire Model. I tried using
queryset=Area.values('name') and it didn't work. How am I suppose to
grab a single column out of a model? My model and form code have been
provided below. Thanks.

#register.forms

from django import forms
from django.db import models
from django.forms import ModelForm
from ylbbq.areas.models import Area

STATES = (
('AK', 'Alaska'),
...
('YT', 'Yukon'),
)

COUNTRIES = (
('USA', 'United States'),
('Canada', 'Canada')
)

class RegisterForm(forms.Form):
username = forms.CharField(max_length=30)
first_name = forms.CharField(max_length=30)
last_name = forms.CharField(max_length=30)
password1 = forms.CharField(max_length=60)
password2 = forms.CharField(max_length=60)
email = forms.EmailField(help_text='Enter a valid e-mail address.')
phone = forms.CharField(max_length=12)
address = forms.CharField(max_length=70)
city = forms.CharField(max_length=50)
state_province = forms.ChoiceField(choices=STATES, label='State or
Province')
country = forms.ChoiceField(choices=COUNTRIES)
zip_code = forms.CharField(max_length=5)
birth_date = forms.DateField()
areas = forms.ModelMultipleChoiceField(queryset=Area.objects.all(),
label='Preferred Areas', help_text='Select the areas that you\'d like
to serve.')

# areas.model

from django.db import models

class Area(models.Model):
name = models.CharField(max_length=40)
city = models.CharField(max_length=50)
phone = models.CharField(max_length=12)
email = models.EmailField()

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