Trillium 2010

[bulborum]

Its not my speciality
that's why I try to buy from reputable nursery's or wholesalers
they where mixed with T. grandiflorum
if they grow together it helps maybe to determinate
maybe some specialist knows the anwser
some close-up pictures maybe it helps

Roland

[WimB]

Roland,

I would say Bjørnar is right, it looks like Trillium sulcatum.

[bulborum]

What is the difference between T. erectum and Trillium sulcatum
I don't see much difference
or my real T. erectum are also T. sulcatum

Roland

[bulborum]

This is my Trillium erectum

Roland

[WimB]

I'm no specialist, but I would say that the petals of Trillium erectum are narrower and (almost) not overlapping at the base. The petals of Trillium sulcatum are more recurving than the petals of T. erectum. Trillium sulcatum has longer flower-pedicels than T. erectum
Oh, and Trillium erectum stinks a lot more; so if you take a sniff you might be able to determinate them correctly. 

[bulborum]

Ok I powder my nose

[arisaema]

T. erectum is also earlier flowering, and has larger flowers compared to the foliage. Here's one of mine on the 5th of May:

ETA: I checked the Trillium monograph, and T. sulcatum does grow together with T. grandiflorum in the very area that most rhizomes are dug.

[TheOnionMan]

Trillium catesbaei just continues to flower over a long period, the pink ones aging to a really bright pink.  A few shots of the bright pink ones, all photos of my pale pink ones came out lousy so not included here, and one photo of a white one.  For a nodding pedunculate species, the flowers show up well from above, as the wavy-edged foliage is narrow and not overly large.

[gote]

A really nice white catesbaei! This is a species that is on the borderline of being hardy here. Twice, a severe winter has cut it back so severely that it did not appear the following year (year 1) but slowly recovered from year 2. It has never split in over fifteen years.

When I dug my old clump of luteum I got so many offsets that I could give a few away. They also grew on with no setback whatsoever. I replanted the original plant in the original spot but it stayed under ground for the two following seasons. This year it comes back again but fairly weak.

My only ovatum only shows up some years.

This is a real dilemma. My vasyei was going towards elysium so I dug it up, dusted with benlate and it recovered in a new location. However, I suppose that if I had dug up my catesbaei, luteum or ovatum for inspection i might have killed them.

Göte

[arisaema]

I've lost a few Trillium to Dumontinia tuberosa when they were growing thru clumps of Anemone nemorosa, so I try to keep those genera (somewhat) separated in the garden. I've wondered if it's better to move Trillium now in flower here in the north with cool summers and a shorter season, rather than wait until they have started going over?

[TheOnionMan]

The flower on Trillium vaseyi x grandiflorum has finally opened. 

1 - the distinctive broad oval leaves on T. vaseyi
2 - T. vaseyi leaves on the left, and the relatively huge rhombic-acuminate leaves of the hybrid on the right... you can make out some leaves of T. grandiflorum behind.  The leaves on the hybrid have the general shape and veining pattern of grandiflorum.
3 - the declining bud of the hybrid, very vaseyi-like, except light colored and with white streaks on the back of the petals.

4 - view showing the leaves and stature of both plants, and freshly opened flower on the hybrid.
5 - closer view of the hybrid's flower
6 - close-up of the flower.  Notice in these views, the base of the back of the petals is whitish.
7,8 front view of the open flowers, the hybrid has white anthers.

[Anthony Darby]

Looks like straight vaseyi to me. If both species are found together in nature hybrids would be either well known or non existant.

[gote]

I've lost a few Trillium to Dumontinia tuberosa when they were growing thru clumps of Anemone nemorosa, so I try to keep those genera (somewhat) separated in the garden. I've wondered if it's better to move Trillium now in flower here in the north with cool summers and a shorter season, rather than wait until they have started going over?

You should definitely NOT wait until they start to get dormant. Most of them start sending out new roots at the time the flowers begin to fade. They will not send out new roots when getting dormant - the root formation process is ended. This means that root damage will not be repaired until next midsummer.

I have divided clumps of dormant plants with the result that I lost more than half of the offsets. When I have divided when the flowers begin to fade I have had near 100% success.

A few of days ago I replanted a number of Trilliums in bud. They now seem perfectly oK and are flowering but the final verdict will not be had until next spring.

Cheers
Göte

[arisaema]

Göte;
I ment the flowers going over, not the leaves, but I agree that moving them in summer is far better than autumn. However, I don't think I've ever lost any that were divided or moved late, they've just skipped over a year or two before sprouting.

Trilliums do grow roots even when they are dormant, at least the completely dried out "Dutch" ones do, but like the seeds it's temperature dependant.

Mark;
I tend to agree with Anthony, I don't see any signs of it being a hybrid other than it's huge size... Both T. vaseyi and T. sulcatum can have those whiteish markings on the backs of the petals.

T. flexipes below, a poor form with nodding flowers, and a T. erectum that was received as an 'Askival Hybrid', anyone have a pic of the real thing?

[gote]

My personal opinion is that #A the genus Trillium has been the playground of splitters #B certain groups one of which is erectum-sulcatum-vasyei-flexipes-simile are just confused. Reliable people report that there are all kinds of intermediate forms.
Said that, I have to call them something so I stick to the supplier's name until I know better.
The first one is "simile" a very nice clone with large flat flowers. This year it even showed one quadrillium 
I am embarking on a dividing and replanting job this year in order to get clumps separated (separated from weeds as well  )
The flexipes seedlings are those I mentioned in an earlier post as moved last week. They are fairly alike but not like th emother plant which holds the flowers above the leaves. The colour of the ovary, which the splitters seem to believe important, varies from pure white to dark purple.
The flexipes plant is another due to dividing. It is not the moteher plant but rather similar.
My oldest 'erectum' probably qualifies as sulcatum.
My bicolor ones probably are real erectum even if atypical in colour.
I believe this is rugelii
The name grandiflorum 'Snowbunting' comes from a fairly knowledgable person. This assembly is the result of cutting the rhizome a few years ago. they will no go to a more prominent place.
Cheers
Göte