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  1. Clark Thomas Riley

    Cypripedium Otto (calceolus x pubescens)

    Aphids, true, for a few hours. Then they're devoured by natural predators.
  2. Clark Thomas Riley

    Cypripedium Otto (calceolus x pubescens)

    My Cypripedium Otto is now in year 6. Has not increased this year, but stable and still beautiful.
  3. Clark Thomas Riley

    Current rothschildianum quality

    When I began growing orchids, a division of Paphiopediluum rothschildianum would run $500–$1,000 and were few and far between. Today, I nice blooming size seedling can be had for $50 and the quality is excellent. His is a plant purchased from Ten Shin Gardens at the 2023 SEPOS show and sale near...
  4. Clark Thomas Riley

    Yang-Ji Apple x Hung Sheng General

    Whoa! Good eye on the cycad. That's Dooon edule, a relatively common cycad from Mexico. I like it better than Cycas revoluta, finding it more graceful. My first encounter with Dioon edule was in a conservatory greenhouse in Chicago, which had a large fruiting specimen. I obtained it from a...
  5. Clark Thomas Riley

    Yang-Ji Apple x Hung Sheng General

    First bloom of Paphiopedilum Yang-Ji Apple x Hung Sheng General which is [philippinense x anitum] x [Saint Swithin x anitum], obtained from Ten Shin Garden Co. Ltd. at this year's SEPOS show . Short time in culture, but very vigorous give 50% anitum!
  6. Clark Thomas Riley

    Yellow Ladyslippers - 3 varieties, 6 clones

    I expect resilience for these species. I will be boosting the pine needle mulch and watching watering. I am replacing the tulip poplars with American Chestnuts. I'm a member of The American Chestnut Foundation and have seedlings of some of the blight and Phytophthora resistant breeding...
  7. Clark Thomas Riley

    Yellow Ladyslippers - 3 varieties, 6 clones

    A better photo showing the consistent difference between Cypripedium pubescens and parviflorum var. parviflorum under absolutely identical culture:
  8. Clark Thomas Riley

    Yellow Ladyslippers - 3 varieties, 6 clones

    My first orchid — April 1957 — was a mail order Cypripedium pubescens, the Large Yellow Ladyslipper. The poor thing spent several tortured months in an apartment west window before passing away. The species is still my favorite. I’m currently kindly growing 3 species varieties: Cypripediums...
  9. Clark Thomas Riley

    Cypripedium flavum MidAtlantic 2024

    My thinking on the red is that Cypripedium Christian (shanxiense x macranthos ssp. hotei-atsumorianum) has the yellow base pigment from shanxiense in half its genome. As noted, the hotei-atsumorianum suppresses the yellow expression in the F1 while imparting a heavy expression of the...
  10. Clark Thomas Riley

    Cypripedium flavum MidAtlantic 2024

    A very warm Spring is pushing Cyps into early bloom here in MidAtlantic Maryland. Excellent growth of Cypripedium Christian — should be in bloom next week. All my clones of Cypripedium pubescens are open now. New this year are Cypripedium acaule, nursery propagated from Carnivorous Plant Nursery...
  11. Clark Thomas Riley

    After a long wait, Liparis lilifolia!

    I have been growing Liparis lilifolia quite well for several years in my bog garden. Several years ago, I came across a large number in a Pennsylvania state forest. While there were many growing in the oak woods, they were sparsely flowered. However, in boggy areas surrounding a lake, there were...
  12. Clark Thomas Riley

    Cyp. japonicum

    I would note that your japonicum is what I call "the Chinese japonicum." Your variety has a bright white base to the lip and bright "lipstick" around the opening. Most Japanese japonicum have a greenish base. It's not the white sepals and petals of formosanum. I had this variety from a Chinese...
  13. Clark Thomas Riley

    Linus Cyps

    Without assistance, Cyp formosana would be difficult in Montana as it is accustomed to milder winters. On the other hand, you’re in the right zone for cold growers like montanum, guttatum, and passerinum. Water requirements can be tricky.
  14. Clark Thomas Riley

    Paphiopedilum Yang-Ji Hawk

    Yes. There have been better ones posted on this forum, but it's too pretty to stay home. I think it's a first-bloom. We'll see what next year brings.
  15. Clark Thomas Riley

    Paphiopedilum Yang-Ji Hawk

    I love the multiflorals, particularly sanderianum. I like dark flowers, particularly anitum. Marry the two and you have a match made in heaven — Paphiopedilum Yang-Ji Hawk. I got a great plant of it from Frank Cervera at the 2024 Paph Forum in Kensington, Maryland. Give me a year and if it's...
  16. Clark Thomas Riley

    Linus Cyps

    Yes. Watching with joy! Cyp formosana is one of the finest additions to our hardy orchid gardens. Much better behaved than its close cousin japonicum and in my opinion much prettier. In addition to its own incredible beauty, there are 10 (!) hybrids registered with it, include the second human...
  17. Clark Thomas Riley

    Earliest mid-Atlantic Cypripedium

    Cypripedium season has begun in the Mid-Atlantic (Baltimore, Maryland). For me the first one up every year is Cypripedium formosanum. Should be in bloom by mid-April. It has been reliable grower here for about 5 years, planted in a raised bed beneath arborvitae trees. Soil was amended with...
  18. Clark Thomas Riley

    Some seedling progress

    Particular congratulations on the Habenarias and the Aplectrum. I don't recall anyone germinating them before. Are those the tropical Habenarias? What media are you using?
  19. Clark Thomas Riley

    Selenipedium palmifolium in flower

    FWIW, when I had Selenipedium aequinoctiale, I tried about 10 cross pollinations with Cypripedium pubescens with no success. No evidence of taking.
  20. Clark Thomas Riley

    Phragmipedium Don Wimber 'Big Al' 4N

    In addition to everything else, looks like each spike is branched. This trait is really important in the impact a plant makes. Nice!!
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