Jepson Flora Project: Jepson Interchange    

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Charles F. Quibell

Shrub, subshrub
Stem < 3 m, generally erect; bark generally peeling as thin sheets or narrow strips
Leaves simple, opposite, deciduous or not, ± hairy; stipules 0; blade ± round to narrowly elliptic, entire or toothed
Inflorescence: cyme, raceme, panicle, or flower 1, terminal or axillary, generally bracted
Flower bisexual, radial; sepals 4–7, free, spreading or erect; petals 4–7, free, ± round to narrowly elliptic, generally white; stamens 10–12 in 2 whorls or many and clustered, filament base linear or wide and flat; pistil 1, ovary superior to 2/3 inferior, chambers 2–8, ovules 1–2 or many per chamber, placentas axile or parietal, styles 3–8, free or fused at base
Fruit: capsule, loculicidal or septicidal; styles persistent or not
Seeds generally many, small to minute
Genera in family: 7 genera, 130 species: temp, subtropical n hemisphere; some cultivated for ornamental (Carpenteria, Deutzia, Philadelphus)
Recent taxonomic note: Recently treated within Hydrangeaceae [Soltis et al. 1995 Amer J Bot 82: 504–514]



Species in genus: 1 sp
Etymology: (Lieutenant A.W. Whipple, 1818–1863, Commander, Pacific Railroad Expedition of 1853–1854)


W. modesta Torr.

Stems: main prostrate, lateral and terminal decumbent to erect; bark gray-brown, peeling as narrow strips
Leaves persistent, ± sessile; blade 1.5–4 cm, 1–3 cm wide, ovate to elliptic, coarsely strigose, upper surface hairs ascending, bulbous-based
Inflorescence: cyme or raceme, dense; flowers 4–12
Flower 4–6 mm wide, odorless; sepals 4–6, 1.5–2 mm, narrowly oblong, ± glabrous; petals 4–6, 3–6 mm, obovate, white; stamens 8–12, ± equal, filament base wide, flat; ovary half-inferior, chambers 4–5, incomplete, placentas ± axile, ovule 1 per chamber, styles 4–5, stigma terminal
Fruit depressed-spheric, separating into segments
Seeds 1 per chamber, plump, honeycomb-pitted
Ecology: Slopes, coniferous forest
Elevation: < 1400 m.
Bioregional distribution: Northwestern California, w San Francisco Bay Area (Santa Cruz Mtns), n Outer South Coast Ranges
Distribution outside California: to Washington
Horticultural information: DRN: 4, 5, 6 &SHD, IRR: 7, 14, 15, 16, 17; GRCVR.

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bioregional map for WHIPPLEA%20modesta being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Whipplea modesta
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