A hybrid between V. utile and V. carlesii.
Achieves dense habit with maturity. Usually evergreen in USDA zone 7 and up, as are the hybrids described below except as noted. Dirr likens the fragrance to that of Daphne odora (not hardy north of Sunset zone 32) but says the blooms are only effective for 7-10 days; Druse calls it clove and powder.
'Mohawk', a backcross with V. carlesii, has received the PHS Gold Medal Award. It has a "refined" habit more compact and less upright than the original, resists leaf spot, and offers stronger and spicier fragrance (considered by some to be the most fragrant viburnum; source: ClassicViburnums.com); however, its fruit set is too sparse to be showy.
'Anne Russell' is a backcross to V. carlesii. 'Chenault[ii]' is denser and more compact than the original, but Stoecklein doesn't deem it fragrant; it is also less likely to be evergreen. 'Duvone' (American Spice) is a sport of 'Sarcoxie' (a backcross to V. carlesii) having a compact habit and beautiful lustrous foliage. 'Park Farm Hybrid' is a sister seedling of the original cross, with the largest flowers of any Burkwood viburnum.
'Conoy' is a backcross of 'Park Farm Hybrid' to V. utile, with glossy foliage and a dense rounded habit that takes shearing well, but less fragrant and not recommended for Sunset zone 37 (stops at 34 and 39).
Sources: Sunset, Stoecklein, JerseyYards.org, Missouri BG, Druse.
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