研究了龙须草的光合特性及叶片解剖结构。龙须草光合速率日均值（ＣＯ２）为３７．１８ｍｇ·ｄｍ-２·ｈ-１，最高值（ＣＯ２）达５９．９０ｍｇ·ｄｍ-２·ｈ-１。６月中旬至８月中旬光合速率最高，９月以后明显减弱；光合速率日变化为一不明显的双峰曲线，ＣＯ２补偿点低，其值（ＣＯ２）为１．２～４．２μｌ·Ｌ-１空气，光呼吸（ＣＯ２）强度只有０～１．８１ｍｇ·ｄｍ-２·ｈ-１，叶绿素ａ／ｂ值为３．６９±０．５０。龙须草叶片宽０．３４～０．４０ｃｍ，叶脉密集，大小维管束总数６３±９个，维管束鞘细胞叶绿体多而大，呈弧状离心排列。结果证明龙须草是典型的Ｃ４植物。 The photosynthetic characteristics and leaf anatomical structure of asparagus officinalis were studied. The photosynthesis rate of Eulaliopsis binata was 37.18 mg · dm-2 · h-1 and the highest value reached 59.90 mg · dm-2 · h-1.6. The mid-August to mid-August photosynthesis rate (P <0.05). The diurnal variation of photosynthetic rate was an unobvious bimodal curve with low CO2 compensation point (CO2) of 1.2 ~ 4.2μl · L-1, The intensity was only 0-1.81 mg · dm-2 · h-1, and the chlorophyll a / b was 3.69 ± 0.50. Asclepiadaceae leaves 0.34 ~ 0.40cm wide, dense veins, the size of the total number of vascular bundle 63 ± 9, vascular bundle sheath cells chloroplast large and large, arc-like arrangement. The results show that asparagus is a typical C4 plant.