Table 2 in Croton calcareus: a new species of dragon's blood (Euphorbiaceae) from dry forest in the state of Chiapas, Mexico

Table 2. Main differences between Croton calcareus Riina & Mateo-Ram. sp. nov., C. redolens Pittier and C. draco L. (the only other species in C. sect. Cyclostigma Griseb. occurring in Mexico).
FeatureCroton calcareus sp. nov.Croton dracoCroton redolensStipulesShort triangular to long filiformSubulate to broadly subulateShort filiformLeaf size (max. cm)5–13 × 3.5–119.9–22.9 × 6.6–17.77.8–8.3 × 4.8–6.3Leaf baseRounded or cordateCordate, rarely roundedRounded, rarely cordateLeaf apexAcute to obtuseAcuminateAcuteAdaxial leaf textureRoughSoftSoftAdaxial leaf trichomesSessile, stellate porrect and stellate multiradiateStipitate, stellate multiradiateStipitate, stellate porrectAdaxial leaf indumentSparse to glabrescentDense to very denseDenseInflorescence length (cm)8–1014.6–42.55.7–15.6Fruit size (mm)12–13 ×2–154–7 × 4–75–6 × 7–8Seed surfaceSmoothRugoseSlightly rugosePlant stature (max. height, m)6253HabitatDry forestMoist forestDry forestDistributionRestricted to ChiapasWidespread (Mexico to Panama)Northern Venezuela