These are growing in a friend's garden. Which ones are they?

The second looks like Yucca filamentosa, I grew it from seed..

http://www.duke.edu/~cwcook/tr...

Are you sure the first isn't an Agave? It has toothed leaves like Agave tequilana ..

http://en.wikipedia.org/wiki/F...

Janet....Frankly I am not certain and appreciate your input about the Agave. I'll check it out. Great to continue to learn .I think you are right on both. Do you think 3 might be an Agave also?

I think the second one is definitely Yucca filamentosa. I have it and you can't miss those filaments.

Thanks Tee.

No. 3 is giving me a headache Paul! I can't decide where it belongs, neither can I find any which look like it. There are narrow leaved agaves and yuccas, the multiple growth can happen with both if cut back but it could be another genus. There's others such as Dyckia.

I think I found a yucca which looks similar but without the filaments and it appears to have a narrow pale edge. Yucca linearifolia is close but not close enough.

I found one which is blue and has filaments, Yucca baccata var. vespertina 'Hualampai Blue' but the leaves are broader.

http://plantlust.com/plants/yu...

That could be it, I found another photo with young plants around which have narrow leaves but not the more blue form.. the filaments can give the impression of having a pale edge. The multiple growth is probably from being cut back.

http://www.yuccaagavaceae.com/...

The description of Yucca baccata var. vespertina 'Hualampai Blue' certainly fits for the area too!

A new Cistus introduction. From our earliest days of botanically exploring the rich area from south western Utah to northern Arizona we've noticed the banana yucca, with forms there having upright, very blue leaves looking much like a misplaced sanseverria. This clone, from the south side of the Colorado river in Mojave County, is one of the bluest of the blue.

Sounds good to me.