Cochleanthes

Posted October 19th, 2011 by Marc Cohen
Categories: Fragrant Orchids, Intermediate Growers, Photos, Watering

Flying bird? Incredible insect? Angel from above? The wonderful flowers of this Cochleanthes have a power to captivate. Its large white and purple blooms can be 4 inches (10 cm) tall.

Cochleanthes flowerClose up of Cochleanthes flower lipCochleanthes flower

This species is native to a vast area of the Amazon Rainforest, across Brazil, Suriname, Venezuela, Colombia, Ecuador, and Peru. The flowers may look delicate, but they’re thick and waxy, and can hold up for months. This type typically blooms in fall and winter.

Purple veins on Cochleanthes flower lipCochleanthes flowerFrilly lip of Cochleanthes flower

Thin leaves without pseudobulbs mean this orchid has little capability to store water. It needs daily watering and high humidity. Mine grows in shady conditions, and receives only a little morning sun. The name is easier to figure out than the captivating flower shape; to pronounce Cochleanthes, say “coke-lee-ANN-these.”

Cochleanthes flowers and leavesCochleanthes flower from aboveClose up of Cochleanthes flower lip

Hanging Gardens Open Greenhouse

Posted October 14th, 2011 by Marc Cohen
Categories: Events

The San Francisco Orchid Society invites you to Hanging Gardens Open Greenhouse this weekend. The sale runs Saturday & Sunday, October 15-16 at Shelldance Nursery off Highway 1 in Pacifica, California. There will be a special repotting clinic on Saturday only, 11 am – 2 pm, with expert demonstrations on potting and mounting orchids. Please note that the repotting clinic is a potluck and also BYOO – bring your own orchid. Fitting for Pacifica’s foggy climate, many intermediate and cool growers, like Cymbidiums, Masdevallias, Odonts, and Draculas, will be for sale.

Tiny Orchid Treasures

Posted October 11th, 2011 by Marc Cohen
Categories: Books, Mini Orchids, Photos

Miniature orchids have all the beauty of their larger cousins, but only take a fraction of the space. These tiny treasures enable orchid lovers to assemble a tropical collection in a single room, on a windowsill, or under lights. Mini forms exist in the Phal, Catt, Cymbidium, Dendrobium, Masdevallia, and Oncidium families, to name a few. The half dozen varieties pictured here are just a drop in the bucket of what’s available.

Mini Bulbophyllum speciesMini Phal hybridMini Cattleya

There’s no formal height rule, but generally mini orchids are plants sized half an inch (1 cm) to half a foot (15 cm.) Some types have taller flower stems, but they’re still considered minis. Many of these compact plants have relatively large blooms, especially compared to their small leaves. There are also varieties with tiny flowers which can be tough to appreciate without a good camera or magnifying lens, like this Lepanthopsis. When growing minis, it’s extra important to water thoroughly and maintain high humidity, since they can quickly dry out on hot or windy days.

Mini Dendrobium speciesMini Masdevallia speciesMini Oncidium hybrid

Whether you grow minis or not, you can enjoy great books about them. Miniature Orchids details hundreds of petite hybrids and species. Author Steven Frowine includes useful care info, beautiful pictures, and helpful lists of minis by light requirements, ease of culture, fragrance, and more.

Miniature Orchids and How to Grow Them is a classic book by famed orchid author Rebecca Tyson Northen. As a biologist, she was one of the first to simply explain orchid care for amateurs when orchids became mass-marketed plants in the 1960’s and 1970’s. She wrote several care books, and this one helped to popularize these tiny orchid treasures.


Autumn Orchid Tips

Posted October 5th, 2011 by Marc Cohen
Categories: Dormancy, Fertilizing, Growing, Watering

As temperatures cool in autumn, the orchid that sat there doing nothing for months may surprise you with a burst of new growth. Relieved of oppressive summer heat, many varieties take this opportunity to grow or bloom. The change of season also requires changes in your orchid care regimen, so here are a few autumn reminders:

October Orchid Shows

Posted October 1st, 2011 by Marc Cohen
Categories: Botanical Gardens, Events

From San Diego to Washington DC, Montreal to Honolulu, Lima to Wellington, and all over Australia, October provides plenty of shows on 6 continents to satisfy orchid lovers. Each show offers incredible blooms, local experts, and vendors to help you find that perfect plant for your collection.

October 1
Jamaica Orchid Society Judging, Jamaica Confederation of Trade Unions Building, Hope Blvd., Hope Pastures, Kingston, Jamaica
October 1
Deep Cut Orchid Society Auction, Colts Neck Firehouse Company #1, 86 Route 537, Colts Neck, New Jersey
October 1
North of England Orchid Show, Barton Community Hall, Barton, Preston, Lancashire, UK
October 1
Redlands Orchid Society Spring Show, Donald Simpson Centre, 172 Bloomfield St., Cleveland, Queensland, Australia
October 1
Howick Orchid Society Show, Fencible Lounge, Uxbridge Rd., Howick, New Zealand
October 1
Perlis Monthly Orchid Show, Taman Rimba Herba, Batu Pahat, Perlis, Malaysia
October 1 – 2
Florida West Coast Orchid Society Show & Sale, Minnreg Hall, 6340 126th Ave. N., Largo, Florida
October 1 – 2
Central New York Orchid Society Show, Beaver Lake Nature Center, E. Mud Lake Rd., Baldwinsville, New York
October 1 – 2
San Diego International Orchid Fair, San Diego Botanic Garden, 230 Quail Gardens Dr., Encinitas, California
October 1 – 2
South Florida Orchid Society Show & Speakers Day, Bank United Center, Univ. of Miami, 1245 Dauer Dr., Coral Gables, Florida

Read the rest of this post »

Bees Don’t Really Need Orchids

Posted September 27th, 2011 by Marc Cohen
Categories: Conservation, Fragrant Orchids, In the News

Orchids need bees more than bees need them. Scientists have long known that male orchid bees use orchid scents to court females. Many tropical species like Stanhopeas and Cycnoches rely on their perfumes to attract amorous male bees as pollinators. The males collect scent compounds using special brushes on their legs, and pollinate flowers in the process. Experts had believed that bees and orchids co-evolved, and each depended on the other, but it turns out that bees don’t really need orchids. New research from UC Berkeley shows that the bees appeared 12 million years before the orchids, and orchids provide only 10% of the fragrances which the bees collect. Instead, tree resins and fungi make up most of the males’ colognes. Rather than co-evolving, the orchids’ evolution follows the insects’ preferences.

With bee populations declining globally, this new info highlights risks for orchid extinctions. Researcher Santiago Ramirez notes “Many of these orchids don’t produce any other type of reward, such as nectar, that would attract other species of bee pollinators. If you lose one species of bee, you could lose three to four species of orchids.”

More Orchids in the Park

Posted September 23rd, 2011 by Marc Cohen
Categories: Events, Fragrant Orchids, Growing Orchids in San Francisco, Mini Orchids, Misc, Photos

To celebrate today’s solstice, I have more photos from last weekend’s Orchids in the Park, along with a few non-orchid shots from Golden Gate Park. Starting outdoors, end of summer delights included a fruit-laden pink passionflower and a working 1914 carousel at the Children’s Playground. The third photo shows part of the living roof at the Academy of Sciences in the foreground, and the top of the de Young Museum in the background.

Pink passionflower with fruit in Golden Gate ParkCarousel in Golden Gate Park Children's PlaygroundView of Academy of Sciences roof and de Young Museum in Golden Gate Park

Inside at Orchids in the Park, the colors began with a blue Dendrobium hybrid, lighter in color than its parent species. Bright colors continued with a pair of Cattleya hybrids which seemed to be inverses of one another. Both had wonderful scents.

Blue Dendrobium hybridCattleya hybridCattleya hybrid

A tiny Stelis featured mini flowers, each smaller than the letter “o” on my keyboard, and an elegant Phrag sported petals that drooped down longer than my arms. Rich red Vanda blooms fell into the large flower category, too. A big white Paph captured my attention, but so did the brilliant purple of a mini Phal. Finally, a multicolored hybrid Howeara displayed an abundance of small charms.

Close up of mini Stelis flowersPhrag flower pouchVanda flower and bud

Lady SlipperMini Phal speciesHoweara flowers

Whether you’re in the northern half of the planet entering autumn, or the southern half starting spring, orchids offer lots of reasons to celebrate the change of season.

Blues in the Park

Posted September 18th, 2011 by Marc Cohen
Categories: Events, Growing Orchids in San Francisco, Photos

It may sound like the name of a music festival in Golden Gate Park, but actually, it’s about orchids. They’re blue orchids to be exact, like the brilliant Dendrobium in the first photo. It’s an uncommon orchid color, and it’s only one of many standouts from Orchids in the Park 2011. Thanks to Dave’s photography skills, we have great blooms to share.

The Blue Orchid, a Dendrobium speciesPaphiopedilum hybridMasdevallia flower

Vuylstekeara flowersMaxillaria flowerPhragmipedium flower

Those blues are impressive, but other hues also show the remarkable range and depth of nature’s palette. Check back soon for more orchid eye-candy from this weekend’s event.

Fun Phal Fact

Posted September 16th, 2011 by Marc Cohen
Categories: Growing, Photos, Warm Growers

If your Phals, or Moth Orchids, aren’t in bloom right now, here’s a useful, fun fact: 3 weeks of cooler temperatures in early autumn can trigger new flower spikes. Typically, Phals don’t want temps below 65°F (18°C.) To mimic a cool spell in their Southeast Asian homes, let them drop to 60°F (16°C) at night, and keep them below 81°F (27°C) during the day. After 3 weeks, return them to their regular warm temps. You won’t notice any immediate changes, but within a month flower spikes should emerge. The spikes can grow for weeks before their blooms open.

Remember that there may be reasons why an orchid isn’t blooming, and this fun Phal fact won’t eliminate the need for bright light, regular water, good humidity, and fertilizer. Normally, cool temps can inhibit a Phal from blooming, but a limited exposure at this time of year can kick them into gear. Then you’ll have great fall colors to enjoy.

Phal hybrid

Golden Dendrobium Threads

Posted September 14th, 2011 by Marc Cohen
Categories: Fragrant Orchids, In the News, Misc

A Burmese group is reviving their tradition of adorning ethnic clothing with orchid threads. In northern Myanmar (also known as Burma,) they weave Dendrobium fibers into fabrics. Locally called “waso,” the orchid is Dendrobium moschatum, a species with great flowers and a musky fragrance. It’s native to lower elevations all around the Himalayas. Fibers made from their soft stems look “like gold threads,” and designs are “sewn by hand using porcupine quills as needles.” A local legend dating back 2500 years presents an ancient love story behind this unusual orchid tradition. Unfortunately, the article only includes one small picture of the colorful clothing, which makes it tough to appreciate the golden Dendrobium threads.