TABLE 1 in Isodon maoershanensis (Lamiaceae), a new species from Guangxi, South China

TABLE 1. Comparison of morphological characteristics between Isodon maoershanensis and the two most similar species.
CharacterI. maoershanensisI. henryiI. megathyrsusLeavestriangular-ovate or rhomboid-ovate, 2–4×1.2–3.0 cm; Densely covered with short white stiff hairs and scattered glandular points above, dense red glandular points and sparsely stiff hairs along veins belowrhomboid-ovate or lanceolate, 2–6× 1.5–4cm; Dense strigose above, sparsely strigose below along veinsbroadly ovate, 3.5–7.5×2– 4.5 cm; puberulent on both sidesPetioles0.5–2.0 cm long, lightly furredUp to 4.0 cm long, slightly strigose0.5–5.0 cm long, upper with narrow wings, densely puberulentLateral veins3–4 pairs, clearly sunken above and erumpent at the back3–4 pairs, raised on both sides3–4 pairs, raised on both sidesBracteal leavesFoliate, with short petiolate, short stiff hairs and glandular pointsFoliate, shortly petiolate or barely sessileFoliate, barely sessileBractsOvate or broadly lanceolate, small, ca. 4 mm longLinear or lanceolate, small, 1–3 mm longLanceolate linear, small, ca. 1.5 mm longInflorescences8–20 cm long, consisting of cymes with 3–5 flowers6–15 cm long, consisting of cymes with 3–5 flowersbroad, up to 30 cm × 20 cm, consisting of cymes with 5–11 flowersCyme peduncles2–13 mm long, covered with short stiff hairs and glandular points1–2 mm long, glandular puberulent3–5 mm long, longest underside, tapering upward, dense glandular puberulentPedicels2–4 mm long, covered with short stiff hairs and glandular pointsCa. 5 mm long, glandular puberulent3–5 mm long, dense glandular piloseCalyxOuter with short stiff hairs and red glandular points, broadly funnel-shaped when flowering, ca. 2 mm long, conspicuously elongated to 4–5 mm when fruit; lobes 5, lobes to calyx 1/2 or lessOuter puberulent and glandular points, broad campanulate when flowering, ca. 3 mm long, elongated to ca. 6 mm when fruit; calyx lobes 5, sepal lobes to calyx 1/2Outer dense glandular points and puberulent, broad campanulate when flowering, 2.5–3 mm long; tubular campanulate when fruit, up to 7 mm long; calyx lobes 5, sepal lobes to calyx 1/2CorollaWhite or light purple, ca. 5 mm long, outer covered with short stiff hairs and red glandular pointsWhite or lilac with purplish points, ca. 7 mm long, pubescent and glandular points on the outsideBlue or bluish-purple, up to 9 mm long, pubescent and glandular pointsCorolla tubeCa. 5 mm long, covered with short stiff hairs on the outside, shallowly sacculate near baseCa. 3.5 mm long, shallowly sacculate above baseCa. 5 mm long and very shallow sacculate above baseCorolla limbupper lip flat, ca. 3 mm long, lower lip navicular, ca. 3 mm longupper lip outwardly reversed, 3 mm long, lower lip navicular, ca. 3.5 mm longupper lip outwardly reversed, ca. 3 mm long, lower lip navicular, ca. 4 mm long

表1. 猫儿山香茶菜（*Isodon maoershanensis*）与两个近缘物种的形态特征比较

| 特征 | 猫儿山香茶菜 | *I. henryi* | *I. megathyrsus* |
|------|------------|-------------|------------------|
| 叶片 | 三角状卵形或菱状卵形，长2–4 cm，宽1.2–3.0 cm；叶面密被白色短硬毛及散生腺点，叶背沿脉密被红色腺点及疏生硬毛 | 菱状卵形或披针形，长2–6 cm，宽1.5–4 cm；叶面密被糙伏毛，叶背沿脉疏被糙伏毛 | 宽卵形，长3.5–7.5 cm，宽2–4.5 cm；两面均被微柔毛 |
| 叶柄 | 长0.5–2.0 cm，被少量柔毛 | 长达4.0 cm，略被糙伏毛 | 长0.5–5.0 cm，上部具窄翅，密被微柔毛 |
| 侧脉 | 3–4对，叶面明显凹陷，叶背隆起 | 3–4对，两面均隆起 | 3–4对，两面均隆起 |
| 苞叶 | 叶状，具短柄，被短硬毛及腺点 | 叶状，具短柄或近无柄 | 叶状，近无柄 |
| 小苞片 | 卵形或宽披针形，较小，长约4 mm | 线形或披针形，较小，长1–3 mm | 披针状线形，较小，长约1.5 mm |
| 花序 | 长8–20 cm，由具3–5花的聚伞花序组成 | 长6–15 cm，由具3–5花的聚伞花序组成 | 宽大，可达30 cm × 20 cm，由具5–11花的聚伞花序组成 |
| 聚伞花序总梗 | 长2–13 mm，被短硬毛及腺点 | 长1–2 mm，被腺微柔毛 | 长3–5 mm，下方者最长，向上渐狭，密被腺微柔毛 |
| 花梗 | 长2–4 mm，被短硬毛及腺点 | 长约5 mm，被腺微柔毛 | 长3–5 mm，密被腺柔毛 |
| 花萼 | 外被短硬毛及红色腺点，花时宽漏斗形，长约2 mm，果期明显伸长至4–5 mm；萼裂片5，长为萼筒的1/2或更短 | 外被微柔毛及腺点，花时宽钟形，长约3 mm，果期伸长至约6 mm；萼裂片5，长为萼筒的1/2 | 外密被腺点及微柔毛，花时宽钟形，长2.5–3 mm；果期呈管状钟形，长达7 mm；萼裂片5，长为萼筒的1/2 |
| 花冠 | 白色或淡紫色，长约5 mm，外被短硬毛及红色腺点 | 白色或淡紫色具紫斑，长约7 mm，外面被柔毛及腺点 | 蓝色或蓝紫色，长达9 mm，被柔毛及腺点 |
| 花冠筒 | 长约5 mm，外被短硬毛，基部上方浅囊状 | 长约3.5 mm，基部上方浅囊状 | 长约5 mm，基部上方具极浅的囊状突起 |
| 花冠檐 | 上唇平展，长约3 mm，下唇舟状，长约3 mm | 上唇外反，长3 mm，下唇舟状，长约3.5 mm | 上唇外反，长约3 mm，下唇舟状，长约4 mm