Draba lonchocarpa Rydb.
lance-fruited draba (lance-fruited whitlow-grass; lancepod draba; spear-fruited draba)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
lance-fruited draba (lance-fruited whitlow-grass; lancepod draba; spear-fruited draba)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
SUBTAXA PRESENT IN BC
Species Information
General:
Tufted perennial herb from a taproot; stems tufted, 1-12 cm tall, glabrous to finely feltlike and woolly with starlike hairs.
Leaves:
Usually all basal, linear to oblanceolate or egg-shaped, 0.5-1.5 cm long, 1-5 mm wide, densely feltlike and woolly with starlike hairs, toothed, midribs firm and withering but persistent; stem leaves lacking or sometimes 1-2.
Flowers:
Racemes 3- to 15-flowered; petals white, 2.5-4 mm long.
Fruits:
Silicles, (3) 7-12 (20) mm long, 1-2 (3.5) mm wide, linear to elliptic or narrowly oblong-oblanceolate, somewhat contorted, glabrous to starlike-hairy; fruiting stalks shorter than silicles; styles 0.2-0.5 mm long; seeds 8-30, about 1 mm long.
Notes:
Three varieties occur in BC.
1. Stems with 1 or 2 leaves, usually more than 2 mm wide; silicles usually appressed to axis of the inflorescence; stems and stalks frequently hairy................ var. vestita O.E. Schulz
1. Stems leafless or rarely with 1 leaf, less than 2 mm wide; silicles usually spreading; upper stems and stalks usually glabrous.
2. Silicles more than 2 mm wide................. var. thompsonii (C.L. Hitchc.) Rollins
2. Silicles less than 2 mm wide............... var. lonchocarpa
Ecology
Ecological Framework for Draba lonchocarpa
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
| Site Information |
Value / Class |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
2072 | 1055 | 2560 |
| Slope
Gradient (%) |
44 | 0 | 90 |
|
Aspect (degrees) |
170 | 28 | 346 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 0 | 5 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
44 | ||
| Modal
BEC Zone Class |
BAFA | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
AT(8), BAFA(12), ESSF(11), ICH(1), IMA(8), MS(1) | ||
|
Source:
Klinkenberg 2013
|
|||