| Trachycarpus |
Habitat and DistributionTrachycarpus princeps is From southern China where it grows on steep cliffs
This dioecious, palmate palm is fairly sought after in cultivation, not just because of its rarity, but its uniquely glaucous underside to the leaves, at least relative to the other Trachycarpus species. The leaves are nearly circular and finely/evenly split deeply. The color on top is a deep green with a hint of yellow in them, at least in full, hot sun. It tolerates full hot sun, and cold, a lot better than Trachycarpus latisectus and martianus, but not as well as the super hardy Trachycarpus species (fortunei, takil and wagnerianus). As a seedling it is a relatively fast grower, with long, thin petioles and somewhat V shaped leaves. As it ages, the leaves become more circular and the glaucous underside becomes somewhat more pronounced (though some seedlings show a dramatic white coloration to the undersides, this is not always the case). Adult palm leaves vary from a pale blue-green underside to nearly pure white. Trunks are about 6"-8"/15-20cm in diameter, and the palm supposedly tops out at around 30'/9m. The trunk tends to have retained, dead leaves over a loose, fibrous weave- not as prounounced as in T. fortunei, though. Editing by edric.
|Detailed Scientific Description|
Solitary, very lightly armed, dioecious palm to about l0 m tall; trunk erect, slender, densely clothed in closely apressed, persistent, fibrous leafsheaths, around 22 cm in diam. or bare, ringed, 13- 16 cm in diam.; leaves l8-26, palmate, marcescent leaves few, sometimes forming a small skirt below the crown, petioles often persisting; leaf-sheath fibrouso relatively coarse, robust, about 45 cm long, abaxially densely covered in pale brown, woolly tomentum; leaf-sheath appendages approximately 10 cm long, very finely divided, upright at first, later strongly reflexed; petiole slender, arching, about 80 cm long, 0.8 cm high and 1.3 cm wide, slightly convex above, triangular below, strongly glaucous, very finely toothed along the margins; hastula shallowly triangular, 1 cm long, regular, crested; leaf-blade, semi- to 3/4 orbicular, 60-80 cm long from the hastula, 90-115 cm wide, dark green above, wax-white below, regularly parted for about half its length into 45-48 stiff, linear segments, tapering towards the apex from their broadest point; central segments 3-3.5 cm wide at the middle, lateral segments gradually more narrow and shorter, apex acute-notched, shortly bifid. Inflorescence's few, solitary, interfoliar, slightly erect to horizontally arranged; male inflorescences about 50 cm long, branched to 4 orders; peduncle short; prophyll about l8 cm long, very broad; peduncular bract one, around 25 cm long, very broad, slighdy tomentose abaxially; rachis bracts 3, similar to peduncular bracts; rachillae 1-3 cm long, fine and very densely branched; female inflorescences about 75 cm long, branched to 3 orders; peduncle about 20 cm long, peduncular bract one, tubular, 30 cm long; rachis bracts 2, similar to ped. bract; rachillae short, 2- l0 cm, fleshy. Flowers not seen. Infructescence bright yellow when fruit are ripe; fruit small, on short stalks, slightly reniform to almost oval, wider than long, 0.8 cm long, 1.0 cm wide, 0.75 cm high; epicarp very thin, black, with a white bloom; mesocarp approximately 0.1 cm thick, spongyfibrous, coated in a very sticky substance; seed reniform, 0.6 cm long, 0.85 m wide, 0.55 cm high; endocarp pale beige, very thin, very slightly crustaceous sand-like layer on a red-brown skin; endosperm homogenous with a deep lateral intrusion; embryo lateral. Germination remote-tubular, eophyll simple, narrow, plicate, wax-white abaxially. (M. Gibbons. 1995)/Palmweb.
The description of the seeds is based on two mature and several empty old seeds only. As there is no recent taxonomic treatment of the genus Trachycarpu.s (but see Beccari 1931 and Kimnach 1977), relationships of T. princeps will be dealt with in a conspectus of the whole genus, which will appear in a later publication. (M. Gibbons. 1995)/Palmweb.
This is a moderately hardy palm, showing some cold damage at or around 25F/-3.8C in a Mediterranean climate. Whether or not it can tolerate a subtropical climate may not be known yet. It's growth is also moderately fast for a Trachycarpus, but not as fast as T. fortunei or takil. It appreciates lots of water, and seems to be tolerant of a variety of soil types. Though tolerant of hot, inland sun, it seems to appreciate a bit of protection from intense, dry heat.
Comments and Curiosities
Etymology: The specffic epithet (L. princeps; literally - a prince) refers to the stately bearing of this palm and the majestic way it looks down, from its lofty position on the sheer cliff faces.
Note: "With much confusion about what is a real princeps , we always declare provenance. To clarify the confusion regarding the various forms, this is the Golden Lotus Nursery statement: -Collecting seeds at the Stone-gate is mostly a waste of time. -So, I get the T. princeps from another mountain-area. That's why my seedlings have a blue colour!!!! The T. princeps from The Stone Gate are green.`` Our plants are grown from Golden Lotus seed and have the bluer leaf colouration. Whilst this plant is generally recognized as the `real princeps` it may turn out to differ to the true Stonegate form. Whether or not it is the true Stonegate form is irrelevant because the leaf colouration and white backs make it unique and highly sought after." (gardenpalms.com)
"This is a relatively new palm to cultivation (2006) but seed and seedlings have been available a few years now. It is characterized by a uniquely blue-white underside to the leaves, making it one of the more ornamental Trachycarpus species. I have a seedling that was in a liner until recently and it has yet to show the glaucous leaves (hope it's the real thing). But it is tolerating full hot, inland, southern California sun so far... better than T martianus and latisectus, both which prefer shade until older. Seems relatively fast compared to those shade lovers, too. There are two 'forms' of this species, both from the same area of China near the border of Tibet. One form is the quintessential stiff-leaved, white undersided form every one is clamouring for, and the other is a frail-leaved, greenish form that looks more like a Trachycarpus fortunei (sadly, that is the form I ended up with). May turn out to be two different species (they have to be in my opinion)." (Geoff Stein)
- Glossary of Palm Terms
- MODERN BOTANICAL LATIN
- "Just To Be Clear"
Phonetic spelling of Latin names by edric.
Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos.
Special thanks to Palmweb.org, Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos.
Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).
Gibbons, M.1995. Trachycarpus princeps, the Stone Gate Palm ,an Exciting New Species from China. Principes 39: 65-74.
Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.