Table 2. Morphological comparison of C. gigabracteatus with C. tsaiana and C. tschonoskii.
| Characters |
C. gigabracteatus |
C. tsaiana |
C. tschonoskii |
| LEAF |
| Shape and size |
Leaf blade elliptic, ovate-elliptic or ovate, 7.0-12.0 × 4.0-7.0 cm, length to width ratio 1.4-2.0, base rounded, rounded-cuneate or cordate, margin regularly or irregularly and doubly minutely serrate, apex acuminate |
Leaf blade elliptic, oblong, oblong-lanceolate or ovate-lanceolate, 8.0-14.0 × 4.0-7.0 cm, length to width ratio 2.0-2.4, base cordate or obliquely cordate, margin irregularly and doubly minutely serrate, apex acuminate |
Leaf blade elliptic, oblong or ovate-lanceolate, 5.0-12.0 × 2.3-5.0 cm, length to width ratio 2.0-2.3, base subrounded or subrounded-cuneate, margin doubly setiform serrate, apex acuminate or caudate-acuminate |
| Length of petiole |
7-14 mm |
7-15 mm |
7-15 mm |
| Number of lateral veins on each side of midvein |
9-14 |
14-17 |
12-16 |
| Lateral veins significantly impressed adaxially or not |
Significantly impressed adaxially |
Not |
Not |
| Abaxially densely villous or sparsely villous along veins |
Densely or sparsely villous |
Sparsely villous |
Sparsely villous |
| INFRUCTESCENCE |
| Size of infructescence |
8.0-12.0 × 5.0-5.5 cm |
10.0-15.0 × 4.0-5.5 cm |
6.0-10.0 × 3.0-4.0 cm |
| Length of peduncle |
1.5-2.5 cm |
1.5-3 cm |
1-4 cm |
| BRACT |
| Size of bract |
3.9-4.8 × 1.4-1.8 cm |
2.5-3.2 × 1.3-1.8 cm |
1.8-5.0 × 0.6-1.2 cm |
| Length to width ratio |
2.3-3.1 |
1.5-2.1 |
2.4-4.2 |
| NUTLET |
| Shape and size of nutlet |
Ovoid-ellipsoid, 5.3-7.0 × 4.0-5.5 mm |
Ovoid-ellipsoid, 5.0-6.0 × 4.5-5.0 mm |
Broadly ovoid, 4.0-5.0 × 3.0-4.0 mm |
| Densely pubescent or villous |
Densely pubescent, densely villous at apex |
Densely pubescent, densely villous at apex |
Glabrous except sparsely villous at apex |
| Densely resinous glandular or not |
Densely resinous glandular |
Densely resinous glandular |
Usually no resinous glandular |