Cornus drummondii C.A. Mey.

Rough-Leaved Dogwood

Cornus drummondii plant

Family - Cornaceae

Stems - To +4m tall, erect, woody, single or multiple from the base. Twigs reddish-brown, terete, with many small malpighian hairs. New seasons growth green, with many malpighian hairs.

Twig of new season.

Leaves - Opposite, petiolate. Blades simple, oblong-elliptic to elliptic-ovate, entire, acuminate, to +10cm long, +/-5cm broad, slightly scabrous and dark green adaxially with strigose pubescence, soft and gray-green abaxially with erect pubescence.

Cornus drummondii leaves

Cornus drummondii leafAbaxial surface of leaf.

Inflorescence - Axillary pedunculate corymbiform cyme on the new seasons growth, to +/-8cm broad. Peduncle to +/-4cm long, scabrous, with appressed whitish and reddish hairs. Pedicels .5 to 1.5mm long, appressed pubescent.

Cornus drummondii inflorescence

Flowers - Corolla white, 4-lobed, to 8mm broad, glabrous internally, appressed pubescent externally. Corolla lobes subulate to lanceolate, 3-4mm long, -2mm broad, acute. Corolla tube 2mm long, greenish white. Stamens 4, alternating with the corolla lobes, exserted, erect to spreading. Filaments white, glabrous, 3-4mm long. Anthers yellow, 2mm long. Style 1, erect, 3mm long, white, glabrous, surrounded basally by a thick light-pinkish nectary. Stigma greenish, capitate. Ovary inferior, 2-locular, with 2 ovules. Placentation axile. Calyx lobes 4, minute, alternating with the corolla lobes, to .5mm long, triangular, appressed pubescent externally, glabrous internally.

Cornus drummondii flowerFlower close-up.

Flowering - May - June.

Habitat - Dry or rocky woods, thickets, limestone, glades, prairies, bluffs, wet ground along streams, fence rows, roadsides.

Origin - Native to U.S.

Other info. - This showy species of Dogwood can be found throughout Missouri and is quite common. The plant would make a good garden specimen as it requires no care once established. The bunches of white flowers are not that long persistent, however.
C. drummondi is the most common species of Dogwood in the state and it can be identified in the field by its small white flowers, green twigs, scabrous adaxial leaf surfaces, and the erect pubescent abaxial surface of its leaves.

Photographs taken off Hwy K, Boone County, MO., 5-29-04.