# Shoot Phenology in _Bambusoideae_: A Review
## 2 Phenological Studies in Bamboo Species
### Phenological Studies in Temperate Bambos
#### 2.2.7 Phylostachys
Several research results have proven that the vertical growth of culms follow the slow-fast-slow growth law and indicated that the growth progress of _P. heterocycla_ (_P. edulis_) occurred more during the day than at night [60, 61, 62]. _P. heterocycla_ (_P. edulis_) cv. _Tubaformis_ was studied for its shooting time and was determined to be from around the 5 th of April till the 29 th-30 th of April every year [63]. The new shoots of _P. elegans_ are produced in the middle of April. The species is distributed in Zhejiang, Hunan, Guangdong, and Hainan in China, and was introduced into the USA [50]. _P. elegans_ was studied for its shooting period in Lian, China. The annual average temperature of that region was 16.5 \({}^{\circ}\)C during the study period. The shooting period of this species was found to be from the 31 st of March to 6 th of May in 2014 (37 days in total) and 30 th of March to 8 th of May in 2015 (39 days in total) [42]. _P. fimbriligula_ produces its new shoots in May and is distributed in Zhejiang and Anhui in China [50]. The shooting period of _P. fimbriligula_ was observed to be from 10 th of April to 31 st of May at the middle and lower reaches of the Yongbu River bank from 1986 to 1989 [64] with a recorded average annual temperature of 18-19 \({}^{\circ}\)C, while the shooting period of _P. fimbriligula_ lasted from 2 nd to 17 th of May in the forest near Hangzhou in 1988 and 1989 [53]. The shooting period of _P. fimbriligula_ was also studied in Lian, China with an annual average temperature of that region being 16.5 \({}^{\circ}\)C during the studied period. The shooting period was from the 15 th to the 30 th of April in 2014 and 19 th of April to 3 rd May in 2015. The shooting period was 15 days long in both years [42]. _P. glauca_ is distributed in areas along the Yellow River and Changjiang River and was introduced to the USA. It grows its new shoots from middle April to late May [50]. _P. glauca_ was studied in 1984 to evaluate the shoot growing period in Luoning Country, Henan Province [65]. The shoot emergence began in early or the middle of April, and it continued shooting for 25 days. The annual average temperature of the observation site was 13.7 \({}^{\circ}\)C. The shooting period of _P. glauca_ was studied for 3 years continuously by [66] in the bamboo garden in Donggang District, China. The average annual temperature was 12.6 \({}^{\circ}\)C. They observed this species' shoot emergence to start in late April, and the shooting period was about 40-70 days long. _P. iridescens_ produces new shoots in middle to late April and is distributed in Jiangsu, Zhejiang provinces of China [50]. The shooting period of _P. iridescens_ was also studied in Lian, China, with an annual average temperature of that region being 16.5 \({}^{\circ}\)C [42]. The shooting period of this species was from the 6 th of April to the 18 th of May in 2014 and 8 th of April to 16 th of May in 2015. The period of shoot sprouting was 39 days total in 2014, and 38 days in total in 2015. _P. iridescens_ was found to have its cumulative growth be greater at night than during the day. The shooting period of _P. iridenscens_ was observed to begin from the 19 th of March to the 30 th of April in a forest near Hangzhou in 1988 and 1989 [53]. The new shoot emergence of _P. mannii_ was reported to be in early May. It can be found in the areas from the Yellow River to the Changjiang River, to Southeast Tibet, India and introduced to the USA [50]. _P. mannii_ cultivated in the bamboo garden of Southwest Forestry University in Yunnan Province, China, was observed for phenological study [48]. _P. mannii_ started shoot-bud differentiation in autumn, and shooting began in March. The branching of _P. mannii_ new culms started in May. The temperature recordings in the tested area were 14 \({}^{\circ}\)C in March, 19 \({}^{\circ}\)C in May, 20 \({}^{\circ}\)C in July, 12 \({}^{\circ}\)C in November, and 9 \({}^{\circ}\)C in January. _P.