Foxgloves

I found myself daydreaming about the foxglove, a lovely flower that is ubiquitous in the English landscape and appears from time to time in my garden. It's an easy plant to grow from seed, and can propagate itself from seed in the garden quite nicely. Looking back, I've grown three types, Digitalis purpurea (common foxglove), Digitalis grandiflora (perennial foxglove), and Digitalis mertonensis (strawberry foxglove). D. grandiflora is perennial and hardy, D. mertonensis is a short-lived perennial (a tetrapolid cross between D. grandiflora and D. purpurea) and D. purpurea is a biennial. Biennials grow foliage in the first year, and flower and set seed in the second year. The biennials die after setting seed. All should be planted in the ground in northern climates, as they will not survive the winter in a pot in zone 3 or colder.
Digitalis grandiflora in the rock garden:

Digitalis also one of those plants we are warned about as being poisonous, due to its content of chemicals that act on the heart. For the same reason, it is one of the most medically famous plants. The plant contains chemicals used in the heart drug digoxin (Lanoxin), a medication used for certain heart diseases (usually atrial fibrillation or heart failure), acting to slow and strengthen the heart beat. Overdose of the drug can result in cardiac arrest. As such, it is a drug (and plant) you must be careful with. I'd imagine the next 20 years of medical research will probably replace this drug with something a little less risky and easier to manage.

An antidote, called Digifab or Digibind, can be given intravenously to mop up toxic levels of digoxin and allow it to exit the body harmlessly via the kidneys. The product monograph is fascinating -- Digifab is made when sheep are injected with a digoxin-derivative attached to a chemical from the keyhole limpet (tiny crustacean that clings to rocks and boat hulls). The sheep serum extract is digested with a bit of pineapple enzyme and the important bits are separated out with a little chromatography, and voila!
Digitalis mertonensis in the raised bed:

Foxglove use was documented in medieval times, as an agent used by witches, when the plant was sometimes called witchs' bells. In the 18th century, a physician (William Withering) noticed that an old woman concocting herbs was having some success in treating edema (likely due to heart failure), and he is credited for discovering that among her collected weeds, digitalis was the effective tonic.
Some self-seeded Digitalis purpurea:

The medicine digoxin is extracted from Digitalis lanata, the wooly foxglove. Apparently, it is cheaper to extract the digoxin from the plant than it is to synthesize the chemical. Presumably, there are medicinal Digitalis farms in existence somewhere.

I have some Digitalis purpurea plants that will flower this year in my perennial beds, but in the interest of trying new and different plants, I would like to try some others. There is a good selection on this American mail order website, which I have ordered from before. I had no idea there were so many kinds! Digitalis are so easy to grow from seed, that I feel wasteful spending good money for them as plants at the nursery.

On the topic of other beautiful flowering plants - here are some pics from another blog, of National Primrose Society Show prize-winning flowers. Amazing.

Tiny Spring Bulbs & Flowers

The lawn is still brown, the lake is still frozen, and the shrubs have yet to grow any leaves. The broad landscape looks dismal on this rainy day, unless you look closely. On a small scale, there is beauty in the tiny flowers of the early spring bulbs. I only have a few of these, but enjoy them nonetheless. All the tiny spring bulbs should be planted in clusters, for maximal effect. I'm hoping my bulbs rapidly divide and bulk up their clusters, so that they can be appreciated from afar (and not just my flower-seeking camera).
Scilla siberica:

Tulipa humilis violacea will be opening soon:

I have these tiny pink botanical tulips planted on my rock garden slope, which they appreciate for its good drainage. These are not picky or demanding little tulips, and have survived the worst winters here.
Fritilaria meleagris has emerged from the soil:

While the rest of Canada's daffodils are probably long past, mine will probably bloom at the end of May. I suppose there are not many other gardeners waiting longer for spring blooms than us here in zone 1b. Beyond this zone, I don't know how many bulb would even survive! Any Siberian gardeners out there?

First Blooms in the Alpine Garden

This is a small post for a small plant: Draba polytricha has bloomed in the alpine garden. This entire plant is about the size (and shape) of a golf-ball. It is a tight little bun of a plant and clearly very hardy, as it lived through two winters so far, including the terrible one of 2009. It looks like a hairy little grey-green bun the rest of the year and probably will look really cool many years from now, as it expands into its rocky crevice.

This photo reminds me that I need to get a useful tripod for my heavy camera and moderately heavy new lens. Unfortunately, I don't exactly know what to get. These little alpine plants require getting pretty low and close. Any photographers have some good ideas?