A Question about the nature of Dan Cong

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    • #8599
      Leo
      Participant

      A fellow member of another tea forum sent me this question through email and I think it would do good to more if I answer it here. So I take the liberty of pasting his email here, with personal particulars omitted:


      Hello Leo,
      I have looked in at an online discussion that has suggested that “Dan Cong” is a cultivar in its own right. I knew it to be a style of cultivation but not a cultivar in its own right. Can you enlighten me on this?
      Also, are the Phoenix tea plants v. sinensis or . assamica (or some other?)
      You can reply to my regular email address: (email addres)
      Many thanks for your help.
      Best regards,
      D___

      I’ll have my answer here after lunch.

    • #9932
      Leo
      Participant

      The original meaning of “Dan Cong” is “single bush”, referring to the idea that the tealeaves from a single bush are not to be mixed with those from any other bush and should be processed and consumed as the product from that singular bush.

      This is still practiced for some special bushes in the Phoenix and the Wuyi regions. A way to satisfy the market for the taste from those famous bushes is to produce children bushes asexually from the mother bushes and plant them in neighbouring plots so the soil and micro-climate are as identical to the mothers’ as possible. The leaves from these children bushes can then be processed as the extended “single bush” idea.
      The reason that the taste from a particular mother plant is different is exactly because Nature has created a unique cultivar through sexual propagation. 
      In Fenghuang (ie Phoenix), (actually in many other oolong regions as well), cultivar diversification is a big topic. Product diversification through this not only helps marketing, but also production resource management. I have written briefly about such topics in Tea Guardian and will write about it in the future in more details.  
      The major group of cultivars in Fenghuang belongs to a group of cultivars called Shuixian, which I suspect is rather a sub-variety rather than just a cultivar group, but I need to verify that with more study. Shuixian presently is classified under Camellia sinensis variety sinensis.
      There are, however, many other cultivars in that area that are NOT under the Shuixian group.
      These are a few photos of different Phoenix cultivars that we have posted in our Facebook page:
      These are some pages that touch on the topic of cultivars in Fenghuang:
      Do let me know if I have not answered your question, or if you have more.
    • #9936
      Leo
      Participant

      D____ responded to my answer with another email. Again, it’s worth sharing here because it does represent the confusion that some people may have. Here it is:


      Hello Leo,
       
      Thank you for your wonderful reply! I am pleased you could confirm that “Dan Cong” refers to the “single trunk” growing and processing method and not to the cultivar per se for I was fearful I might have been misleading my customers. As to the variety, is Shuixian the same variety as is grown in Wuyi? I know this variety is widely grown in China.
       
      Another point (question): in the wine business we would refer to what you have called “sub-species” as different clones and the asexual propagation method you describe as cloning. Might the different bushes be referred to as “clones” rather than “sub-species?” For example, in the viticultural field, vitis vinifera is the species, chardonnay is a cultivar and Wente and UCD4 are clones (and there are hundreds of chardonnay clones each with its own particular ripening cycle and taste nuance.) To carry this into tea it would be camellia sinensis v. sinensis as the species (and sub-species), shuixian as the cultivar and zhuye as the clone. Does this make any sense?
       
      In one of your essays, you stress the difference between Wulong (the cultivar) and Oolong (the manufacturing style.) I had always thought this a confusion unique to Taiwan (early in my career I was at a cupping in Taipei and one taster averred that the best tea was the Wulong; I thought “what, they are all oolongs!” – it took me some weeks to be clear on the difference.) In Taiwan the Wulong is a particular clone of the Qing Xin cultivar. What is it in China?
       
      Thanks again for all of your help Leo; I know I have much reading ahead of me as I move through your voluminous research in The Tea Guardian.
       
      Cheers,
       
      D_____
    • #9937
      Leo
      Participant

      To me, the botanical taxonomy of the tea plant goes like this:

      1. Genus: Camellia
      1.1 Species: Camellia sinensis
      1.1.1 Variety: Camellia sinensis var sinensis
      1.1.2 Variety: Camellia sinensis var assamica
      1.1.1.1 Cultivar: Camellia sinensis var sinensis cv Qingxin
      1.1.1.2 Cultivar: Camellia sinensis var sinensis cv Qingxin Dawu
      1.1.1.3 Cultivar: Camellia sinensis var sinensis cv Qingxin Ganzi
      etc, etc

      To me, a clone is a “replica” of a cultivar. When a clone grows in a different environment it may result in leaves with different physical & chemical properties. 

      Clones and Qingxin
      The way the word “clone” is used in the wine world is confusing to me and I have tried very much to avoid it.
      Wulong is a collective term for many things in the Chinese tea world and one meaning refers to quite a large number of cultivars used particularly for oolong tealeaves production. For example, Qingxin is a wulong cultivar. So are many others in an average Taiwan tea garden: Jingxuan, Four season, #13, etc, etc. There are even more used in Mainland China. Many are forming every year in different research institutes and by tea farmers themselves.
      Shuixian
      There are many other cultivars used particularly for oolong production that are not in the group of wulongs. Such as the group we call shuixian. 
      I suspect (still much study needed) that shuixian is not only a group but rather a sub-variety (not sub-species), as I said before. And I suspect that those cultivars used in Wuyi and in Phoenix (Fenghuang) are of the same origin. However, there are many cultivars within this group. A cultivar is different from another sometimes only slightly, but sometimes quite dramatically, even within the same group. Physically and chemically. They give teas of different taste profiles. For example, the cultivar baiye gives Honey Orchid (milan xiang) and the cultivar zilan gives Zilan Xiang. The two tea are of almost opposing characters. They are both Shuixian. A baiye can have many variations due to sexual propagation, different natural mutation due to environment etc and the clones from different baiye individual plants do have different values. Therefore they do have names for different baiye plants. Maybe at that level, you’d like to apply the term clones for them. I am searching for a more suitable one.
      There are many literature in Chinese documenting the physicality of different cultivars (though not enough yet) and I don’t want to get too explicit and technical here lest I bore the readers.
      Let me know if you have other ideas.
    • #9939
      sofie1212
      Participant

      So does it mean there are many different kinds of Shuixian trees and some make one kind of dan cong and some another kind and some the ordinary shuixian tea?

    • #9980
      Leo
      Participant

      Yes there are many different “kinds” of shuixian tea trees, some of which are more unique and are used to make different distinctive tasting kinds of “dan congs”, while others are less distinctive are used to make various grades of generic shuixian and alas, also generic dan congs. In lesser production areas, where the tea trees are plucked more than once or twice a year, the leaves of distinctive tea trees can be processed together to form generic “dan congs” and shuixians too.

    • #9984
      happyman
      Participant

      This is the first time I read anything like this anywhere. Thank you for such detail explanation. Does it mean there are still people making tea out of the leaves from one single bush? It seems rather inefficient to me. Would the tea taste very differently from those that are made from many trees?

    • #9985
      Leo
      Participant

      That’s right, those that are really single bush processed are very little in quantity, some as little as one kilo a year. However, a lot of such production trees are quite huge and dense and make 5 kilos. Some people even claim 10, but I doubt that. These batches are not cheap. In the early Communist regime, one was reserved expressly for the notorious Chairman Mao. Now people come in their limo to wait for the processing to complete to take home, paying often a few hundred thousands RMB, directly in cash to the farmer, for the batch. That translates to tens of thousand USD for a couple of kilos of tea.

      So do you think that’s high efficiency or low efficiency? 
      In terms of taste, those nova-riches are making a mistake that we old time traders see immediately — the tealeaves that they got from the farmers are maocha, ie leaves before the final finish processing. Often this step is done by the producers, not the farmers. Without this step, the tea tastes fresh and bright for a few weeks, and never at its peak taste potential.
      Finish processing for oolongs, esp traditional oolongs, requires a few important steps for quality optimization and storage. Baking of the leaves is involved. Resting of the tea is another. Different varieties and different quality grades require different attention. The true wonders of a tea can then unveil itself upon proper infusion.
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