I grow 3 yellow leaf macrophyllas, the 2 you mentioned and Lemon Zest. Lemon Daddy and Lemon Zest are mopheads. Not aware of any others.
Could the LC you have possibly be a Hydrangea serrata?
Smaller plant, smaller foliage, smaller flowers, than the macrophylla's, such as Sun Goddess, a/k/a Yellowleaf(Yellow Leaf).
There are 2 serrata's with yellow foliage that I am aware of; Golden Sunlight and Oran. They would be Lace Caps.
Haven't found them locally in my area yet and the mail order source I use, doesn't have them either.
Wish you luck!
Rb

scoprow,
propagate them! It's easy.

Rb,
I grow Golden Sunlight for 3 years from the small rooted cutting and found it surprisingly hardy-it was blooming for me last year and all top buds are intact after this winter as well. Blooms are nothing to write home about.
Bright yellow foliage in spring (as emerged) become chartreuse in June and stays that way till fall when it become orange-red. Mine is sited with a very dark leaved rhododendron as a background, so color contrast is very noticeable. I know you are collector and wouldn't mind to send you a cuttings after it blooms, if you are interested.

Thank you both! I dug through my files last night (knew I had that plant tag SOMEWHERE!) and sure enough, it is Golden Sunlight. The blooms really are not much, but I love the bright leaves. I have it placed by some Castle series hollies now, with the sun shining through from the back in the evening, and it does look like a golden beacon! But I want two more there, so I'm going to divide and move one I have on the other side of the yard which doesn't show to advantage.

I just hope there's not a little too much sun where I'm putting them - will have to keep them well-watered.

Razorback - can you give me any feedback on Lemon Daddy? Maybe I'll use that as a replacement for the one I'm moving.

skoprow....
I have 2 'Lemon Daddy', one planted near the trunk of an old White Oak, the other one in a location that receives some morning sunlight. There seems to be no difference in the color of the foliage, both are bright yellow and they seem to hold their color all summer. The flowers are not as large as 'Big Daddy', but that may be an inherent feature or because of their location.
My two 'Lemon Zest' do not seem to be as robust as LD. One receives several hours of morning sun, other several hours of afternoon sun. May move one of them to a total shade location, to see if any improvement. As of now, I wouldn't recommend it, unless you have the patience of Jobe!
Having to relocate 'Sun Goddess'. as it is in a location that receives some afternoon sunlight and very little water, even when it rains, as it's sheltered somewhat by a Southern Magnolia.

ego45...
I would be interested in a cutting of your 'Golden Sunlight', since we are still beleagured by a pesistent drought, the local plant purveyors have decided to switch to drought tolerant plants, which doesn't include Hydrangeas. It may be years, if ever, that I will find that one locally. H. serratas are not in demand hereabouts, because they don't have showy flowers! The few collectors here have no clout.
Let me know what species/cultivar you are looking for and I may have it or one that interests you.
Rb

Rb - Would be happy to send you a cutting, too, of Golden Sunlight. Just tell me when is the best time to take it/ ship it to you. I haven't done much propagation, but am starting to do more now; I guess with age comes patience!? LOL

Thanks for the Lemon Daddy and Lemon Zest advice - will def look for Lemon Daddy around here...

I empathize with your drought situation - must not be easy. Have just received 3" and forecast is for rain again for the next week, so I'm behind in my spring gardening chores!

I am not believing my good fortune!
I was browsing the Hydrangea area at a local nursery and there sat a lone 'Golden Sunlight'. A rather small one in a one gallon pot, apparently too small to entice the average customer. I picked it up for half price, so now have to find the right location to plant it.
Thanks for your offers of cuttings. I will probably propagate this one later this year, if I can coax some new growth from it.
Rainfall situation has not improved here. A very large band of rain approached from the west during the weekend, there were reports of up to 6" in some locations, but began to dissipate about 50 miles from here and I only received a trace.
Rb

How lucky was that! And I thought you were going to tell me when to send you a cutting!!! Am looking for a "new" hydrangea for Mother's Day - need three for a certain pretty shady spot. I saw Bliss and Big Smile - do you have anything to say about either of them? If you know anything, I'd love your input! Thanks!

Big Smile aka Sweet Chris is not very showy hydrangea unless,

a) it is grown in alcaline soil where it become more or less intensely pink/burdundy colored vs washed out baby pink/dirty white color it's in acidic soil
and
b) it is grown in a considerable sun exposure where leaf margin gain dark burgundy color by the mid summer and transition to the whole leaves in cherry-red to wine to burgundy colors in a fall.

IMO, in a 'pretty shady area' + acidic soil it will be just waste of space.

skoprow...
I have 2 Big SmileÂ, a/k/a Hydrangea x 'Sweet Chris',(PP15222), which is a LaceCap and a hybrid between macrophylla & serrata.
They were in bloom when I purchased them 2 years ago and their attraction was the serrated sterile florets and burgundy stems. (Plus, they were on sale at half-price!).
I haven't paid much attention to them since the purchase, as I spent all of last year, just trying to keep my plants alive, with only about half of normal rainfall and severe outdoor watering restrictions(and much reduced water pressure!).
The nursery didn't have Bliss a/k/a 'Sweet Carol'(PPAF), which is another macrophylla x serrata cross and is said to have larger flowers (not serrated) than Big SmileÂ, but other features of the plant are basically the same.
Hines Horticulture(holder of Patent rights), says they are hardy to Zone 6 and have been trialed there. They also recommend them for shade/part shade locations in the garden.
Some of my serratas do bloom well in high shade, but experience tells me, that, long term, all Hydrangeas require some direct sunlight, either morning, afternoon or dappled sun/shade during the day to provide maximum blooms year after year.
Give them a try, if you like LaceCaps, these appear to be 2 good ones.
Rb