What kind of orchid did Lu Xun go up the mountain to collect? Does anyone know?

Lu Xun had many flower hobbies, but his favorite was orchids. Lu Xun's love of orchids had family reasons; his family could be called an orchid-growing family. In his youth, he often invited his second brother Zhou Zuoren and third brother Zhou Jianren to go up Fushan, Tashan, and Jishan in the city to collect orchids. Sometimes they brought dry rations and went far outside the city to Kuaiji Mountain, Lanzhu Mountain, and Ruozeshan by East Lake to collect them.

On March 18, 1911, when Lu Xun, Zhou Zuoren, and Wang Hezhao went to visit the Mausoleum of Yu at the foot of Kuaiji Mountain, they suddenly had the idea to collect orchids again. Before setting out, Lu Xun prepared two painted tin buckets and a copper spade for everyone to carry. When they arrived at the Mausoleum of Yu, they visited the Yu Temple and the Bianshi Pavilion, then went to Kuaiji Mountain to collect orchids. On the hillside, weeds grew thickly and thorns filled the path. When they reached the mountaintop, the thorns gradually became fewer, and overhanging cliffs jutted out diagonally.

Lu Xun leaned over and looked down, and saw that a huge rock with an area of more than a zhang was covered with moss and weeds, among which small flowers grew scattered here and there, five or six stalks forming a cluster, about ten or more clusters in all. Truly, their leaves could be counted and their flowers classified, and their fragrance was unmatched, a peerless treasure. May I ask everyone, on this trip up the mountain, what Lu Xun collected, something worthy of being called a peerless treasure, what orchid was it? Does anyone know?