林下養蜂為臺灣目前林地經營管理中林下經濟發展項目中最重要的類型之一，由於森林環境的複雜性以及養蜂基地周邊的植物相資料的不足，導致對蜜源植物的依賴變得不確定。若能建立一個當地更完整的蜜源植物資料庫，將有助於穩定森林蜂蜜的質與量，開發高品質的特色蜂產品，進而提高養蜂業的收入。本研究於國立臺灣大學生物資源暨農學院實驗林管理處清水溝營林區第11林班內設置一林下養蜂基地，並在其半徑3公里的範圍內，共設置50個樣區，調查養蜂基地周邊可能為蜜蜂採集花蜜的植物種類。研究結果顯示維管束植物共計103科404種。包括石松類植物1科3種，蕨類植物17科70種，裸子植物1科1種，單子葉植物11科54種，雙子葉植物73科276種。以茜草科19種為最多，菊科和鳳尾蕨科18種次之。蜜源植物共計有31科60種，全年皆有蜜源植物開花，其中主要集中在春季和夏兩季，秋、冬兩季蜜源植物開花種數較少，但每月蜜源植物開花的種數皆達20種以上，顯示此區域具豐富和充足的蜜源，可支持林下養蜂的需要。並且建議管理單位未來進行新植造林時，可優先選擇原生蜜源樹種，以增加本區域之蜜源多樣性。

Understory Beekeeping is one of the most crucial components of Taiwan's current forest land management and understory economic development initiatives. However, the complexity of forest environments, coupled with the absence of comprehensive floral data, have introduced uncertainty regarding reliance on honey plants. The establishment of a comprehensive local database encompassing honey plants is imperative for stabilizing the quality and quantity of forest honey. Such an initiative not only facilitates the development of high-quality specialty bee products, but also augments income within the beekeeping industry. To address this need, this study established an understory beekeeping base within the 11th forest compartment of the Qingshuigou tract, managed by the experimental forest, college of bio-resources and agriculture, National Taiwan University. Within a 3-kilometer radius of the base, 50 sample plots were strategically arranged to investigate potential nectar sources for bees in the vicinity of the beekeeping base. The study results revealed a rich tapestry of plant life, with a total of 404 species from 103 families of vascular plants recorded. This includes 3 lycopodiopsida species from lycophytes, 70 species from 17 families of ferns, 1 species from gymnosperms, 54 species from 11 families of monocotyledonous plants, and 276 species from 73 families of dicotyledonous plants. Among them, the family Rubiaceae had the highest species count at 19, followed by the Asteraceae and Polypodiaceae families, each with 18 species. The Study documented a total of 60 honey plant species from 31 families, all exhibiting year-round blooming. The primary flowering periods were concentrated in spring and summer, with fewer species blooming in fall and winter. However, each month witnessed the blossoming of more than 20 honey plant species, underscoring the region's abundant and diverse honey sources, capable of supporting the needs of understory beekeeping. Additionally, we suggest prioritizing the planting of native honey plant species during the afforestation planning to increase the diversity of nectar sources in the region.